tell vs tell apart

tell and tell apart both are verbs.

Word	Noun	Adjective	Verb	Adverb
tell	No	No	Yes	No
tell apart	No	No	Yes	No

As verbs, tell and tell apart are synonyms defined as:

Other synonyms of tell include differentiate, distinguish, secern, secernate, separate, severalise, severalize.

tell (verb)	tell apart (verb)
discern or comprehend	mark as different
mark as different	detect with the senses
let something be known
narrate or give a detailed account of
give instructions to or direct somebody to do something with authority
give evidence
express in words
inform positively and with certainty and confidence