label vs tell apart

label is a noun but tell apart is not a noun.

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

As verbs, tell apart is a hypernym of label; that is, tell apart is a word with a broader meaning than label:

label: distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions
tell apart: mark as different

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

As verbs, tell apart is a hypernym of label; that is, tell apart is a word with a broader meaning than label:

label: distinguish (as a compound or molecule) by introducing a labeled atom
tell apart: mark as different

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

label (noun)	tell apart (noun)
an identifying or descriptive marker that is attached to an object
a brief description given for purposes of identification
trade name of a company that produces musical recordings
a radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction

label (verb)	tell apart (verb)
distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions	mark as different
distinguish (as a compound or molecule) by introducing a labeled atom	detect with the senses
assign a label to; designate with a label
pronounce judgment on
attach a tag or label to