locking pliers vs plyers

locking pliers and plyers both are nouns.

Word	Noun	Adjective	Verb	Adverb
locking pliers	Yes	No	No	No
plyers	Yes	No	No	No

As nouns, plyers is a hypernym of locking pliers; that is, plyers is a word with a broader meaning than locking pliers:

locking pliers: pliers that can be locked in place
plyers: a gripping hand tool with two hinged arms and (usually) serrated jaws

Other hypernyms of locking pliers include pair of pliers, pliers.

locking pliers (noun)	plyers (noun)
pliers that can be locked in place	a gripping hand tool with two hinged arms and (usually) serrated jaws