scapula vs shoulder blade

scapula and shoulder blade both are nouns.

Word	Noun	Adjective	Verb	Adverb
scapula	Yes	No	No	No
shoulder blade	Yes	No	No	No

As nouns, scapula and shoulder blade are synonyms defined as:

scapula and shoulder blade: either of two flat triangular bones one on each side of the shoulder in human beings

Other synonyms of scapula include shoulder bone.

scapula (noun)	shoulder blade (noun)
either of two flat triangular bones one on each side of the shoulder in human beings	either of two flat triangular bones one on each side of the shoulder in human beings