bellboy vs attender

bellboy and attender both are nouns.

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

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

bellboy: someone employed as an errand boy and luggage carrier around hotels
attender: someone who waits on or tends to or attends to the needs of another

Other hypernyms of bellboy include attendant, tender.

bellboy (noun)	attender (noun)
someone employed as an errand boy and luggage carrier around hotels	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