spread over vs coat

spread over is not a noun while coat is a noun.

Word	Noun	Adjective	Verb	Adverb
spread over	No	No	Yes	No
coat	Yes	No	Yes	No

As verbs, coat is a hyponym of spread over; that is, coat is a word with a more specific, narrower meaning than spread over:

spread over (noun)	coat (noun)
	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

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