micrometer caliper vs micrometer

micrometer caliper and micrometer both are nouns.

Word	Noun	Adjective	Verb	Adverb
micrometer caliper	Yes	No	No	No
micrometer	Yes	No	No	No

As nouns, micrometer caliper and micrometer are synonyms defined as:

micrometer caliper and micrometer: caliper for measuring small distances

Other synonyms of micrometer caliper include micrometer gauge.

micrometer caliper (noun)	micrometer (noun)
caliper for measuring small distances	a metric unit of length equal to one millionth of a meter
	caliper for measuring small distances