accompany vs accompaniment

accompany is not a noun while accompaniment is a noun.

Word	Noun	Adjective	Verb	Adverb
accompany	No	No	Yes	No
accompaniment	Yes	No	No	No

accompany (noun)	accompaniment (noun)
	the act of accompanying someone or something in order to protect them
	something added to complete or embellish or make perfect
	a musical part (vocal or instrumental) that supports or provides background for other musical parts
	an event or situation that happens at the same time as or in connection with another

accompany (verb)	accompaniment (verb)
perform an accompaniment to
go or travel along with
be present or associated with an event or entity
be a companion to somebody