label vs brandmark

label is a noun but brandmark is not a noun.

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

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

Other hyponyms of label include brand, trademark, point, point, point, calibrate, code, badge, favorite, favourite.

label (noun)	brandmark (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)	brandmark (verb)
distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions	mark with a brand or trademark
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