I Have A Friend Who Likes ...
ABBOTT
EGGS
KNOW
COPS

CHIMP
EELS
BELT
FILMS

EMPTY
FIRST
GHOST

But Dislikes ...
COSTELLO
BACON
LEARN
ROBBERS

HYENA
SNAKES
SUSPENDERS
THEATER

FULL
LAST
HANGMAN

Can you figure out why my friend likes certain words and not others?