attender vs listener

attender and listener both are nouns.

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

As nouns, attender and listener are synonyms defined as:

Other synonyms of attender include auditor, hearer.

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