raincoat vs coat

raincoat and coat both are nouns.

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

As nouns, coat is a hypernym of raincoat; that is, coat is a word with a broader meaning than raincoat:

raincoat: a water-resistant coat
coat: an outer garment that has sleeves and covers the body from shoulder down; worn outdoors

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

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