Finally finished! I skipped over the creatures, minerals, foods, etc because we've already discussed it. I'll restate my hope that maybe language_sym can be cleaned up a little rather than outright remove words, but unfortunately I have no concrete suggestions. Thank you for your work!
Unnecessarily technical (and sometimes obscure) words
gangue
gimlet
glottis
haslet
hydrodynamic
knurl
moraine
oviduct
panegyric
panicle
patten
peen
petiole
plectrum
potsherd
praline
quiff
quire
quisling
rhizome
selvage
skein
soporific
spathe
distaff
spindrift
stamen
styptic
talus
thole
thymus
thyroid
treacle
Overly obscure words
gammon
graniferous
granivorous
homologous
immiscible
importunate
inexpiable
irascible
jink
kyle
lade
lanceolate
lobworm
locus
macerate
maudlin
mellifluous
militate
moribund
numinous
obdurate
obstreperous
panjandrum
paroxysm
parterre
penury
perfidy
pertinacious
pistil
plebiscite
plenipotentiary
plexus
pock
primp
psoriasis
querulous
reprobate
serio-comic (or at least remove the hyphen if it needs to be kept)
sinecure
speleology
squiffy
stalking-horse
stultify
truculent
ullage
votary
vulcanology (or at least rename to volcanology if it needs to be kept)
weir
whitlow
wiseacre
Words that are british-isms and already exist as American words
gybe
squidgy
Medical conditions
gingivitis
gumboil
haemorrhoid
impetigo
oedema (duplicate of edema)
mastitis
melanoma
meningitis
mumps
myalgia
neuritis
purblind
scrofula
scurf (but please add scarf, which isn't in this dictionary)
Words that seem out of place in the setting
freeway
funfair
grapeshot
grenade
gunfight
gunfire
gunpowder
handbrake
histogram
hotplate
mailbag
mailbox
marshmallow
mudguard
nacho
pesticide
pistol
scrapyard
sharpshooter (tricky: in meaning it should be kept, but by etymology you fire arrows and bolts, not shoot them. I think it sounds like it implies using a gun.)
sunblock
Words to keep but change
hell-fire - rename to hellfire
hell-hole - rename to hellhole
miaow - rename to meow
sex (have-sex adjective) - rename to fuck. Also, please add variations that indicate the participants: masturbation has male, female, and mutual variants, it would be useful and fun to indicate which genders are participating in the act.
wholegrain - rename to whole-grain
Words that contain hyphens and therefore might contribute to awkward constructions
forbidden-fruit
forgotten-beast
Suggested words to add (that aren't mentioned above)
strip (undressing variant, please differentiate between deprive someone of something and undress)