Theory:

Meanings:
 
Words
Meanings
almost untruetoo good to be true, unbelievable
antennaea pair of long, thin sensory attachments on the heads of insects
anthillsa nest in the form of mound built by ants
grubsthe larva of an insect, like ants
barracksa building for soldiers to stay
alienbelonging to a different species or a group
loyaltybeing faithful
 
Opposites:
  
Words
Opposites
smallestbiggest
intelligentfoolish
untruetrue
comfortableuncomfortable
bravelycowardly
tinylarge