tell apart in WordNet English dictionary

1. mark as different
   "We distinguish several kinds of maple"
   distinguish  separate  differentiate  secern  secernate  severalize  severalise  tell  tell apart 
   
2. detect with the senses
   "The fleeing convicts were picked out of the darkness by the watchful prison guards"; "I can't make out the faces in this photograph"
   spot  recognize  recognise  distinguish  discern  pick out  make out  tell apart 
   

tell apart in English Wiktionary