clipper vs shears

clipper and shears both are nouns.

Word	Noun	Adjective	Verb	Adverb
clipper	Yes	No	No	No
shears	Yes	No	No	No

As nouns, shears is a hypernym of clipper; that is, shears is a word with a broader meaning than clipper:

clipper (noun)	shears (noun)
scissors for cutting hair or finger nails	large scissors with strong blades
shears for cutting grass or shrubbery
a fast sailing ship used in former times
(electronics) a nonlinear electronic circuit whose output is limited in amplitude; used to limit the instantaneous amplitude of a waveform (to clip off the peaks of a waveform)