Absolutely loving the game so far! There seems to be a lot of easter egg words out there, here are some that I found:

rat, byeah, shpee, short, green,  AA, EE, OO, lala, scorn, onion and jerma.

Post more below!

Edit: found AMONG as well.

Found "Teach, Sussy, Enemy, Pain, Otto, Craft, Clown, Any swear word, including 'Zenis', and lastly, Meat" 

gyas, rat, gooey, ayaya, life, pog, giant, peep, boat, doubt, eren, and king, an easy way to find them is to type in jerma because jerma randomly picks a voiceline to play.

Speen and Grand causes vinesauce to showup

"yeow" works

any swear words 

all i could find is peep, jerma, rat

scoot

giant

bugle for bugleberry!

vinny

TUMOR

I found "peter"