commercial traveller vs roadman

commercial traveller and roadman both are nouns.

Word	Noun	Adjective	Verb	Adverb
commercial traveller	Yes	No	No	No
roadman	Yes	No	No	No

As nouns, commercial traveller and roadman are synonyms defined as:

commercial traveller and roadman: a salesman who travels to call on customers

Other synonyms of commercial traveller include bagman, commercial traveler, traveling salesman, travelling salesman.

commercial traveller (noun)	roadman (noun)
a salesman who travels to call on customers	a salesman who travels to call on customers
	a workman who is employed to repair roads