coat vs garment

coat and garment both are nouns.

Word	Noun	Adjective	Verb	Adverb
coat	Yes	No	Yes	No
garment	Yes	No	Yes	No

As verbs, garment is a hypernym of coat; that is, garment is a word with a broader meaning than coat:

Other hypernyms of coat include apparel, clothe, dress, enclothe, fit out, garb, habilitate, raiment, tog.

coat (noun)	garment (noun)
growth of hair or wool or fur covering the body of an animal	an article of clothing
an outer garment that has sleeves and covers the body from shoulder down; worn outdoors
a thin layer covering something

coat (verb)	garment (verb)
cover or provide with a coat	provide with clothes or put clothes on
put a coat on; cover the surface of; furnish with a surface
form a coat over