stretcher-bearer vs attendant

stretcher-bearer and attendant both are nouns.

Word	Noun	Adjective	Verb	Adverb
stretcher-bearer	Yes	No	No	No
attendant	Yes	Yes	No	No

As nouns, attendant is a hypernym of stretcher-bearer; that is, attendant is a word with a broader meaning than stretcher-bearer:

stretcher-bearer: one who helps carry a stretcher
attendant: someone who waits on or tends to or attends to the needs of another

Other hypernyms of stretcher-bearer include attender, tender.

stretcher-bearer (noun)	attendant (noun)
one who helps carry a stretcher	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

stretcher-bearer (adjective)	attendant (adjective)
	being present (at a meeting or event, etc.)
	occurring with or following as a consequence