attendant vs subsequent

attendant is a noun but subsequent is not a noun.

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

attendant (noun)	subsequent (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

attendant (adjective)	subsequent (adjective)
being present (at a meeting or event, etc.)	following in time or order
occurring with or following as a consequence