tell apart vs compare

tell apart is not a noun while compare is a noun.

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

tell apart (noun)	compare (noun)
	qualities that are comparable

tell apart (verb)	compare (verb)
mark as different	examine and note the similarities or differences of
detect with the senses	consider or describe as similar, equal, or analogous
	to form the comparative or superlative form on an adjective or adverb
	be comparable