abut vs neighbour

abut is not a noun while neighbour is a noun.

Word	Noun	Adjective	Verb	Adverb
abut	No	No	Yes	No
neighbour	Yes	No	Yes	No

As verbs, neighbour is a hyponym of abut; that is, neighbour is a word with a more specific, narrower meaning than abut:

Other hyponyms of abut include neighbor.

abut (noun)	neighbour (noun)
	a nearby object of the same kind
	a person who lives (or is located) near another

abut (verb)	neighbour (verb)
lie adjacent to another or share a boundary	be located near or adjacent to
	live or be located as a neighbor