microcomputer vs personal computer

microcomputer and personal computer both are nouns.

Word	Noun	Adjective	Verb	Adverb
microcomputer	Yes	No	No	No
personal computer	Yes	No	No	No

As nouns, microcomputer and personal computer are synonyms defined as:

microcomputer and personal computer: a small digital computer based on a microprocessor and designed to be used by one person at a time

Other synonyms of microcomputer include PC.

microcomputer (noun)	personal computer (noun)
a small digital computer based on a microprocessor and designed to be used by one person at a time	a small digital computer based on a microprocessor and designed to be used by one person at a time