skilled worker vs skilled workman

skilled worker and skilled workman both are nouns.

Word	Noun	Adjective	Verb	Adverb
skilled worker	Yes	No	No	No
skilled workman	Yes	No	No	No

As nouns, skilled worker and skilled workman are synonyms defined as:

skilled worker and skilled workman: a worker who has acquired special skills

Other synonyms of skilled worker include trained worker.

skilled worker (noun)	skilled workman (noun)
a worker who has acquired special skills	a worker who has acquired special skills