silicon chip vs microcircuit

silicon chip and microcircuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
silicon chip	Yes	No	No	No
microcircuit	Yes	No	No	No

silicon chip (noun)	microcircuit (noun)
electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuit	a microelectronic computer circuit incorporated into a chip or semiconductor; a whole system rather than a single component