as there are no direct synonyms for 'tell apart' as a whole, I will give you them individually.
tell as a verb - describe, narrate, recite, recount, rehearse, relate, report
apart as an adverb - asunder, piecemeal
also.. I will add in the synonyms for 'difference' as that's generally how you 'tell apart'
difference as a noun - contrast, disagreement, discrepancy, disparateness, disparity, dissimilarity, distinction, distinctiveness, distinctness, diverseness, diversity, unlikeness
dismember
you tell me
Synonym: fondness, accessory Antonym: aversion
portray explain depict illustrate express tell
advise, announce, declare, communicate, express, inform, instruct
A synonym for apart is "Separate".
to come apart
differentiate, determine, separate, discriminate, judge, ascertain, tell the difference, characterize, mark, single out, set apart
dismember
break, separate, split up, fall apart, come apart
you tell me
Synonym: fondness, accessory Antonym: aversion
taking apart, mutilation, torture, torturing
The answer depends on what you want tell it apart from!
apart disconnect away divide split detach
broken-down, crumbling, battered, falling apart
A synonym for segregation is separation, isolation, exclusion, setting apart, apartheid, seclusion, discrimination, ghettoization