accompanying vs attendant

accompanying is not a noun while attendant is a noun.

Word	Noun	Adjective	Verb	Adverb
accompanying	No	Yes	No	No
attendant	Yes	Yes	No	No

As adjectives, accompanying and attendant are synonyms defined as:

accompanying and attendant: occurring with or following as a consequence

Other synonyms of accompanying include collateral, concomitant, consequent, ensuant, incidental, resultant, sequent.

accompanying (noun)	attendant (noun)
	an event or situation that happens at the same time as or in connection with another
	someone who waits on or tends to or attends to the needs of another
	a person who is present and participates in a meeting

accompanying (adjective)	attendant (adjective)
occurring with or following as a consequence	being present (at a meeting or event, etc.)
	occurring with or following as a consequence