crest vs blazon

crest and blazon both are nouns.

Word	Noun	Adjective	Verb	Adverb
crest	Yes	No	Yes	No
blazon	Yes	No	Yes	No

crest (noun)	blazon (noun)
a showy growth of e.g. feathers or skin on the head of a bird or other animal	the official symbols of a family, state, etc.
(heraldry) in medieval times, an emblem used to decorate a helmet
the center of a cambered road
the top line of a hill, mountain, or wave
the top or extreme point of something (usually a mountain or hill)

crest (verb)	blazon (verb)
reach a high point	decorate with heraldic arms
lie at the top of