label vs mark

label and mark both are nouns.

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

As nouns, mark is a hypernym of label; that is, mark is a word with a broader meaning than label:

Other hypernyms of label include marker, marking.

As verbs, mark is a hyponym of label; that is, mark is a word with a more specific, narrower meaning than label:

Other hyponyms of label include call, address, direct, be known as, call, know as, name, brand, denounce, stigmatise, stigmatize.

As verbs, label and mark are synonyms defined as:

Other synonyms of label include tag.

label (noun)	mark (noun)
an identifying or descriptive marker that is attached to an object	something that exactly succeeds in achieving its goal
a brief description given for purposes of identification	an indication of damage
trade name of a company that produces musical recordings	a marking that consists of lines that cross each other
a radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction	the impression created by doing something unusual or extraordinary that people notice and remember
	a number or letter indicating quality (especially of a student's performance)
	a written or printed symbol (as for punctuation)
	a symbol of disgrace or infamy
	a distinguishing symbol
	a visible indication made on a surface
	a reference point to shoot at
	a perceptible indication of something not immediately apparent (as a visible clue that something has happened)
	a person who is gullible and easy to take advantage of
	formerly the basic unit of money in Germany

label (verb)	mark (verb)
distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions	make or leave a mark on
distinguish (as a compound or molecule) by introducing a labeled atom	insert punctuation marks into
assign a label to; designate with a label	assign a grade or rank to, according to one's evaluation
pronounce judgment on	celebrate by some ceremony or observation
attach a tag or label to	put a check mark on or near or next to
	be a distinctive feature, attribute, or trait; sometimes in a very positive sense
	make underscoring marks
	remove from a list
	designate as if by a mark
	establish as the highest level or best performance
	make small marks into the surface of
	mark with a scar
	attach a tag or label to
	notice or perceive
	to accuse or condemn or openly or formally or brand as disgraceful