Midsummer Night's Dream: Act 2 scene 1

dale(noun)-- valley
pale(noun) -- fenced in area, enclosure
pensioners(noun)-- gentleman of the royal bodyguard
changeling(noun)-- a child stolen by fairies, a stolen child
anon(adv)-- soon
shrewd(adj)-- mischievous
knavish(adj)-- dishonest
beguile(verb)-- hoodwink
dewlap(noun)-- fold of loose skin around the neck
forsooth(adv)-- in truth
tarry(verb)-- linger
amorous(adj)-- strongly moved by love(often sexual love)
margent(noun)-- edge, border
yoke(noun)-- a wooden bar or frame by which two draft animals are joined at the heads or necks for working together
murrain(adj)-- infected with plague
rheumatic diseases(adj)-- with symptoms of watery discharge, cold-like
wonted(adj)-- accustomed, customary
progeny(noun)-- outcome, product
dissension(noun)-- disagreement
promontory(noun)-- prominent landmass that overlooks lowland or a body of water
dulcet(adj)-- pleasant, agreeable
leviathan(noun)-- sea monster

Midsummer's Night's Dream: Act 1 Scene 1

Nuptial (adj)-- Having to do with marriage

Yes, this word is still in use.

Apace (adv)-- quickly

No, this word is mostly used in archaic situations

Methinks (verb)-- it seems that...

No, this word is mostly used in archaic situations

Vexations (noun)-- something annoying

Yes, this word is still in use.

Nosegay (noun)-- a small bouquet of flowers usually with a pleasing scent

Yes, this word is still in use.

Notes: 

Philostrate is the 'Master of Revels' in Theseus' Court. In other words, the manager of entertainment. 

Bosum in this situation refers to Hermia's heart, not her cleavage.