Abrasive: Showing little concern for the feelings of others; harsh.
Accusatory: To blame.
Acerbic: Sharp and forthright.
Acidic: Bitter or cutting.
Acrimonious: Angry and bitter
Adenoidal: Nasal.
Alto: The highest adult male singing voice; countertenor. The lowest female singing voice; contralto.
Animated: Full of life or excitement; lively.
Appealing: Attractive or interesting.
Astringent: Sharp or severe in manner or style.
Authoritative: Like to be respected and obeyed; commanding and self-confident.
Barbed: Deliberately hurtful.
Baritone: Singing voice between tenor and bass from an adult male.
Barking: Make a sound such as a cough or a laugh, resembling a bark; utter (a command or question) abruptly or aggressively.
Bass: Low pitched voice.
Big: The ability to speak, sing, etc
Biting: Harsh or cruel.
Bitter: Angry, hurt, or resentful because of one's bad experiences or a sense of unfair judgement.
Bland: Showing no strong emotion; dull and unremarkable.
Bleak: Cold and forbidding.
Blunt: Uncompromisingly forthright.
Bombastic: High-sounding but with little meaning; inflated.
Booming: Loud, deep, and resonant.
Bored: Uninterested.
Boyish: Of or befitting a boy.
Brash: Self assertive in a rude, noisy, or overbearing way.
Braying: Speak or laugh loudly and harshly.
Breathy: An audible sound of breathing, often related to physical exertion or strong feelings.
Breezy: Appearing relaxed, informal, and cheerily brisk.
Bright: Intelligent and quick-witted.
Brisk: Active, fast, and energetic.
Brittle: Appearing aggressive or hard but unstable or nervous within.
Broken: Having given up hope; despairing.
Bubbly: Full of cheerful high hopes.
Burbling: Continuous murmuring noise.
Calm: Tranquil and quiet.
Caustic: Sarcastic in a scathing and bitter way.
Cheerful: Noticeably happy and optimistic.
Cold: Lacking affection or warmth of feeling; unemotional.
Colorless: Lacking distinctive character or interest; dull.
Contralto: The lowest female singing voice.
Countertenor: The highest male adult singing voice.
Crisp: Briskly decisive and matter of fact, without hesitation or unnecessary detail.
Critical: Expressing adverse or disapproving comments or judgements.
Croaky: Deep and hoarse.
Cutting: Causing emotional pain; hurtful.
Dead: Having or displaying no emotion, sympathy, or sensitivity.
Demanding: Making others work hard or meet high standards.
Disembodied: Lacking any obvious physical source.
Disinterested: Having or feeling no interest in something.
Dispassionate: Not influenced by strong emotion and so able to be rational and impartial.
Droning: Speak tediously in a dull monotonous tone.
Dulcet: Sweet and soothing.
Dull: Lacking interest or excitement.
Effervescent: Vivacious and enthusiastic.
Energetic: Showing or involving great activity or vitality; active.
Exasperated: Having or showing strong feelings of irritation or annoyance.
Faint: Barely perceptible.
Fawning: Displaying exaggerated flattery or affection; obsequious.
Feathery: Having, covered with, or resembling feathers.
Feeble: Faint.
Fierce: Showing a heartfelt and powerful intensity.
Firm: Showing a resolute determination and strength of character.
Flat: Lacking interest or emotion; dull and lifeless.
Forceful: Strong and assertive; vigorous and powerful.
Fretful: Feeling or expressing distress or irritation.
Fruity: Mellow, deep, and rich.
Gentle: Soft; having or showing a mild, kind, or tender temperament or character.
Girlish: Of or befitting a girl.
Glum: Looking or feeling dejected; morose.
Goofy: Foolish or harmlessly eccentric; silly.
Gracious: Courteous, kind, and pleasant.
Grating: Sounding harsh and unpleasant.
Grave: Serious or solemn in manner or appearance; somber.
Gravelly: Deep and rough-sounding.
Grim: Forbidding and uninvited.
Growling: Low and grating guttural sound in a way that expresses hostility and anger.
Gruff: Rough and low in pitch.
Guttural: Produced in the throat; harsh-sounding.
Hard: Stern, unwavering or unyielding.
Harsh: Unpleasant, unkind, cruel, or more severe than is necessary.
Hearty: Enthusiastic, energetic, and often loudly expressed.
Hesitant: Slow to act or proceed (as from fear, indecision, or unwillingness).
High-pitched: A voice that is higher than usual.
Hissing: To make a noise like a long S sound; like a snake.
Hoarse: (Of a person or a voice) having a rough voice, often because of a sore throat or a cold.
Honeyed: Used to describe speech or a person's voice when it is gentle and pleasant to listen to, sometimes in a way that is not sincere.
Hostile: Having an intimidating, antagonistic, or offensive nature.
Hushed: Having the sound level reduced; very quietly-- especially used of the noise of conversation.
Husky: Low and rough voice.
Immense: Extremely large or great, especially in scale or degree.
Impartial: Treating all rivals and disputants equally; fair and just.
Indifferent: Having no particular interest or sympathy; unconcerned.
Indistinct: Not easily seen, heard, or recognized.
Ingratiating: Flattering.
Insinuating: Hinting at something bad in an indirect and unpleasant way.
Intense: Having or showing strong feelings or opinions; extremely earnest or serious.
Ironic: Showing that you really mean the opposite of what you are saying.
Jeering: Making rude and mocking remarks, typically in a loud voice.
Joking: Humorous and flippant.
Jubilant: Feeling or expressive great happiness and triumph.
Lifeless: Dead or apparently dead.
Lacking vigor, vitality, or excitement.
Light: Gentle or delicate.
Lilting: Increase the volume or pitch of (ones voice).
Lively: Full of life and energy; active and outgoing.
Loud: Characterized by sound of great volume or intensity.
Loving: Feeling or showing love and affection.
Low: Very low in volume.
Malicious: Having the nature of threatening evil.
Matter-of-Fact: A matter that is an actual fact or is demonstrable as a fact.
Mellifluous: Pleasing to the ear.
Melodious: Having a musical sound; especially a pleasing sound.
Mezzo-soprano: A soprano with a voice between soprano and contralto.
Mild: Humble and meek-- the opposite of bold.
Mocking: Expressing contempt or ridicule.
Modulated: Changed or adjusted in pitch, tone, or volume.
Monotone: A droning, unchanging tone.
Monotonous: Dull, tedious, and repetitious; lacking in variety and interest.
Mournful: Filled with grief or sadness.
Muffled: Cover or wrap up (a source of sound) to reduce its loudness.
Musical: Having a pleasant sound; melodious or tuneful.
Muted: No sound.
Nasal: Produced or characterized by resonating in the nose as well as the mouth, e.g. Lois Griffin from Family Guy.
Nasty: Behaving in an unpleasant or spiteful way.
Neutral: Having no strongly marked or positive characteristics or features.
Nonchalant: Feeling or appearing casually calm and relaxed; not displaying anxiety, interest, or enthusiasm.
Obsequious: Obedient or attentive to excessive or servile degree.
Oily: Unpleasantly smooth and ingratiating.
Orotund: Full, round, and imposing.
Passionate: Showing or caused by intense feelings or a strong belief.
Penetrating: Clearly heard through or above other sounds.
Piercing: Extremely high, loud, or shrill.
Piping: High-pitched.
Placating: Intended to make someone less angry or hostile.
Plummy: Having an accent thought typical of the English upper classes.
Polished: Refined, sophisticated, or elegant.
Pretentious: Attempting to impress by affecting greater importance, talent, culture, etc than is actually possessed.
Quavering: Shake or tremble in speaking, typically through nervousness or emotion.
Querulous: Complaining in a petulant or whining manner.
Quiet: Tranquil and reserved by nature; not brash or forceful.
Ragged: Rough or uneven.
Raspy/rasping: Hoarse or harsh sounding.
Raucous: Making or constituting a disturbingly harsh and loud voice.
Raw: Strong and undisguised.
Razor-edged: Very sharp.
Reedy: Unpleasant.
Refined: Elegant and cultured in appearance, manner, and taste.
Relaxed: Free from tension and anxiety; at ease.
Resonant: Deep, clear, and continuing to sound or ring.
Restrained: Characterized by reserve or moderation; unemotional or dispassionate.
Ringing: Having or emitting a clear resonant sound.
Roaring: Utter a loud, deep, prolonged sound.
Robust: Strong.
Rough: Not gentle; violent or boisterous.
Rumbling: A continuous deep, resonant sound.
Surly: Bad mannered and unfriendly.
Sweet: Pleasant and kind or thoughtful.
Sympathetic: Feeling, showing or expressing sympathy; feelings of pity and sorrow for someone else's sorrows.