Notes
1. This list is not exhaustive. I've chosen to omit certain archaic words and phrases for sake of understanding.
2. Not all words contained herein are "archaic"; some are simply dated, formal, or uncommon.
3. British English is used for this story. Therefore, the spelling of some words will differ (e.g. Armor = Armour; Center = Centre; Practice = practise, if a verb; shriveled = shrivelled)
4. This list is not proprietary; you may use and/or copy it to your benefit!
***
A
Abandon (lack of inhibition/restraint)
Afore (before)
Aggrieved (treated unfairly)
Agone (ago)
Ail/Ailment (trouble/afflict, an illness)
Alas (pity, concern, alarm)
Alow (beneath, downward)
Anon (soon, shortly)
Apothecary (seller/preparer of medicines)
Aright (right, correctly)
Art (are)
Aught (anything at all)
Aye (yes/affirm)
B
Bade (bid–past)
Befall (happen to)
Before (in front of)
Beforetime (formerly)
Behold (observe)
Betwixt (between)
Bid (wish, command, invite, request)
But (only, except for)
D
Dire (extremely serious/urgent)
Divers (of various types/several)
Dwelt (dwelled)
E
Ere (before)
Erelong (before long)
Err (fail, be mistaken)
Endlong (lengthwise)
Entreat (treat)
Expedient (suitable/appropriate)
F
Fashion (make into/craft)
Fathom (understand)
Fly (flee)
Forbear (refrain patiently)
Forgone (past)
Forthright (directly forward, direct spoken)
Forthwith (immediately)
Fortuitous (by lucky chance)
Fret (be anxious)
H
Hail (to greet or acclaim)
Hark (listen, pay close attention)
Hasten (hurry)
Henceforth (from now on)
Herein (in this)
Hereinto (into this place/matter)
Heretofore (until now)
Hitherto (until then)
Howbeit (although)
I
If soever (if ever)
Impress (push an idea)
Inasmuch (considering/to the extent that)
Infirmity (weakness)
Indelicate (insensitive)
Insomuch (to such extent)
Intreat (beg/plead earnestly/anxiously)
Ironical (ironic)
J
Jest (joke)
L
Laden (loaded)
Lest (intending to prevent/avoid
Lo ("check it out")
Longsuffering (patient, tolerant)
M
Manifest (clear, obvious, evident)
Meddle (unduly interfere)
Meet (fitting, proper)
Mere (solely, no more/better than)
Mete (allot justice/punishment/harshness)
Mettle (fortitude/resilience)
Moreover (besides, as a further matter)
Morrow (tomorrow, morning)
N
Nary (not at all, not a one)
Naught (nothing)
Nay (no)
Needn't (need not)
Ne'er (never)
Nigh (nearly, almost, close)
No wise (not at all)
O
O (oh)
O'er (over)
Oft (often)
Ought (implying duty/correctness)
P
Part (leave)
Peradventure (perhaps, uncertainty)
Plight (dangerous/unfortunate situation)
Puff (be excessively proud)
Q
Quarrel (disagreement, heated argument)
R
Repentant (expressing sincere remorse)
Rouse (excite, awaken, startle)
S
Sate (satisfy)
Scant (barely sufficient/adequate)
Scarce (scarcely, only just/almost not)
Shan't (shall not)
Shew (show)
Slew/Slay (kill violently)
Soever (of any kind or extent)
Solace (comfort/consolation)
Some deal (somewhat)
Some whither (somewhere)
Spurn (reject with disdain/contempt)
Stay (stop, delay, assuage)
Steed (horse ridden/to ride)
Still (stop/hold steady)
Stir (move)
Straightaway (right away)
Stupor (state of near-unconsciousness)
Sware (swore, pst)
T
Thee (you–object)
Thereagainst (against it/that)
Therein (in that place, document, respect)
Thereinto (into that or it)
Thereon (there upon)
Thereupon (immediately, shortly after)
Therewith (with or in, soon/imm. after)
Therewithal (together with that)
Thine (yours)
Thither (to that place)
Thou (you–subject)
Thus (so, therefore, as a result)
Thy (your)
'Til (until)
'Tis (it is)
Toil (labor)
'Twas (it was)
'Twill (it will)
U
Unseemly (improper, inappropriate)
Unto (to)
Usward (toward us)
V
Vaunt (boast or praise excessively)
Verily (truly, certainly)
W
Wert (were–2nd per.)
Whereagainst (against which)
Wherefore (for what reason, as a result)
Whereinsoever (in whatsoever resp./place)
Whereinto (into which)
Whereof (of what)
Whereon (on what)
Whereupon (immediately after which)
Wherethrough (through which)
Whereuntil (until which)
Wherewith (with what or which)
Wherewithal (means)
Whither (to what place, to which)
Whithersoever (wherever to)
Whosoever (whoever)
Withal (in addition)
Without (outside)
Wouldst (wouldest)
Wrought (worked, pst.)
Y
Yea (yes)
Ye (you–plural)
Yet (still)
Yon/Yonder (that/those over there)
You (you–singular)