crest vs heraldry

crest and heraldry both are nouns.

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

crest (noun)	heraldry (noun)
a showy growth of e.g. feathers or skin on the head of a bird or other animal	emblem indicating the right of a person to bear arms
(heraldry) in medieval times, an emblem used to decorate a helmet	the study and classification of armorial bearings and the tracing of genealogies
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)	heraldry (verb)
reach a high point
lie at the top of