other words for tell apart
EXAMPLE SENTENCES FROM THE WEB
Far, far above us the monster mountains nuzzled among the clouds till cloud and mountain were hard to tell apart.
There were forty scholars: squirmy, grimy little things that I found it hard to tell apart at first.
All three were well over six feet, and Hjalmar stood head and shoulders over his brothers, whom I never learned to tell apart.
This is the work of some six or seven writers, whose hands are sometimes hard to tell apart.