pump-type pliers vs plyers

pump-type pliers and plyers both are nouns.

Word	Noun	Adjective	Verb	Adverb
pump-type pliers	Yes	No	No	No
plyers	Yes	No	No	No

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

pump-type pliers: a type of pliers; usually used to grip and turn nuts, bolts and pipe fittings
plyers: a gripping hand tool with two hinged arms and (usually) serrated jaws

Other hypernyms of pump-type pliers include pair of pliers, pliers.

pump-type pliers (noun)	plyers (noun)
a type of pliers; usually used to grip and turn nuts, bolts and pipe fittings	a gripping hand tool with two hinged arms and (usually) serrated jaws