bedsore vs decubitus ulcer

bedsore and decubitus ulcer both are nouns.

Word	Noun	Adjective	Verb	Adverb
bedsore	Yes	No	No	No
decubitus ulcer	Yes	No	No	No

As nouns, bedsore and decubitus ulcer are synonyms defined as:

bedsore and decubitus ulcer: a chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients)

Other synonyms of bedsore include pressure sore.

bedsore (noun)	decubitus ulcer (noun)
a chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients)	a chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients)