thinning shears vs plural

thinning shears and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
thinning shears	Yes	No	No	No
plural	Yes	Yes	No	No

thinning shears (noun)	plural (noun)
shears with one serrate blade; used for thinning hair	the form of a word that is used to denote more than one

thinning shears (adjective)	plural (adjective)
	grammatical number category referring to two or more items or units
	composed of more than one member, set, or kind