pair of pincers vs pincer

pair of pincers and pincer both are nouns.

Word	Noun	Adjective	Verb	Adverb
pair of pincers	Yes	No	No	No
pincer	Yes	No	No	No

As nouns, pair of pincers and pincer are synonyms defined as:

pair of pincers and pincer: a hand tool for holding consisting of a compound lever for grasping

Other synonyms of pair of pincers include pair of tweezers, tweezer.

pair of pincers (noun)	pincer (noun)
a hand tool for holding consisting of a compound lever for grasping	a grasping structure on the limb of a crustacean or other arthropods
	a hand tool for holding consisting of a compound lever for grasping