NSAID vs nonsteroidal anti-inflammatory drug

NSAID and nonsteroidal anti-inflammatory drug both are nouns.

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

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

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

Other synonyms of NSAID include nonsteroidal anti-inflammatory.

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