concomitant vs attendant

concomitant and attendant both are nouns.

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

As adjectives, concomitant and attendant are synonyms defined as:

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

As nouns, concomitant and attendant are synonyms defined as:

concomitant and attendant: an event or situation that happens at the same time as or in connection with another

Other synonyms of concomitant include accompaniment, co-occurrence.

concomitant (noun)	attendant (noun)
an event or situation that happens at the same time as or in connection with another	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

concomitant (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