try vs rehear

try is a noun but rehear is not a noun.

Word	Noun	Adjective	Verb	Adverb
try	Yes	No	Yes	No
rehear	No	No	Yes	No

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

Other hyponyms of try include retry.

try (noun)	rehear (noun)
earnest and conscientious activity intended to do or accomplish something

try (verb)	rehear (verb)
put on a garment in order to see whether it fits and looks nice	hear or try a court case anew
melt (fat or lard) in order to separate out impurities
take a sample of
test the limits of
give pain or trouble to
make an effort or attempt
put to the test, as for its quality, or give experimental use to
examine or hear (evidence or a case) by judicial process
put on trial or hear a case and sit as the judge at the trial of