attend vs attender

attend is not a noun while attender is a noun.

Word	Noun	Adjective	Verb	Adverb
attend	No	No	Yes	No
attender	Yes	No	No	No

attend (noun)	attender (noun)
	someone who waits on or tends to or attends to the needs of another
	a person who is present and participates in a meeting
	someone who listens attentively

attend (verb)	attender (verb)
give heed (to)
work for, or be a servant to
take charge of or deal with
be present at (meetings, church services, university), etc.
to accompany as a circumstance or follow as a result