pair of pliers vs plyers

pair of pliers and plyers both are nouns.

Word	Noun	Adjective	Verb	Adverb
pair of pliers	Yes	No	No	No
plyers	Yes	No	No	No

As nouns, pair of pliers and plyers are synonyms defined as:

pair of pliers and plyers: a gripping hand tool with two hinged arms and (usually) serrated jaws

Other synonyms of pair of pliers include pliers.

pair of pliers (noun)	plyers (noun)
a gripping hand tool with two hinged arms and (usually) serrated jaws	a gripping hand tool with two hinged arms and (usually) serrated jaws