work clothes vs work-clothes

work clothes and work-clothes both are nouns.

Word	Noun	Adjective	Verb	Adverb
work clothes	Yes	No	No	No
work-clothes	Yes	No	No	No

As nouns, work clothes and work-clothes are synonyms defined as:

Other synonyms of work clothes include work-clothing, work clothing.

work clothes (noun)	work-clothes (noun)
clothing worn for doing manual labor	clothing worn for doing manual labor