clamp vs pipe clamp

clamp and pipe clamp both are nouns.

Word	Noun	Adjective	Verb	Adverb
clamp	Yes	No	Yes	No
pipe clamp	Yes	No	No	No

As nouns, pipe clamp is a hyponym of clamp; that is, pipe clamp is a word with a more specific, narrower meaning than clamp:

clamp: a device (generally used by carpenters) that holds things firmly together
pipe clamp: a clamp for holding pipe that is to be cut or threaded

Other hyponyms of clamp include bench clamp, C-clamp, cramp, pipe vise, press.

clamp (noun)	pipe clamp (noun)
a device (generally used by carpenters) that holds things firmly together	a clamp for holding pipe that is to be cut or threaded

clamp (verb)	pipe clamp (verb)
impose or inflict forcefully
fasten or fix with a clamp