maid of honor vs attender

maid of honor and attender both are nouns.

Word	Noun	Adjective	Verb	Adverb
maid of honor	Yes	No	No	No
attender	Yes	No	No	No

As nouns, attender is a hypernym of maid of honor; that is, attender is a word with a broader meaning than maid of honor:

maid of honor: an unmarried woman who attends the bride at a wedding
attender: someone who waits on or tends to or attends to the needs of another

Other hypernyms of maid of honor include attendant, tender, adult female, woman.

maid of honor (noun)	attender (noun)
an unmarried woman who attends the bride at a wedding	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