nonsteroidal anti-inflammatory drug vs NSAID

nonsteroidal anti-inflammatory drug and NSAID both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonsteroidal anti-inflammatory drug	Yes	No	No	No
NSAID	Yes	No	No	No

As nouns, nonsteroidal anti-inflammatory drug and NSAID are synonyms defined as:

nonsteroidal anti-inflammatory drug and NSAID: an anti-inflammatory drug that does not contain steroids

Other synonyms of nonsteroidal anti-inflammatory drug include nonsteroidal anti-inflammatory.

nonsteroidal anti-inflammatory drug (noun)	NSAID (noun)
an anti-inflammatory drug that does not contain steroids	an anti-inflammatory drug that does not contain steroids