label vs secern

label is a noun but secern is not a noun.

Word	Noun	Adjective	Verb	Adverb
label	Yes	No	Yes	No
secern	No	No	Yes	No

As verbs, secern is a hypernym of label; that is, secern 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
secern: mark as different

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

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

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

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

label (noun)	secern (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)	secern (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
assign a label to; designate with a label
pronounce judgment on
attach a tag or label to