pallbearer vs bearer

pallbearer and bearer both are nouns.

Word	Noun	Adjective	Verb	Adverb
pallbearer	Yes	No	No	No
bearer	Yes	No	No	No

As nouns, pallbearer and bearer are synonyms defined as:

pallbearer and bearer: one of the mourners carrying the coffin at a funeral

pallbearer (noun)	bearer (noun)
one of the mourners carrying the coffin at a funeral	a messenger who bears or presents
	one of the mourners carrying the coffin at a funeral
	the person who is in possession of a check or note or bond or document of title that is endorsed to him or to whoever holds it
	someone whose employment involves carrying something