overall vs work clothes

overall and work clothes both are nouns.

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

As nouns, work clothes is a hypernym of overall; that is, work clothes is a word with a broader meaning than overall:

overall: (usually plural) work clothing consisting of denim trousers (usually with a bib and shoulder straps)
work clothes: clothing worn for doing manual labor

Other hypernyms of overall include work-clothes, work-clothing, work clothing.

overall (noun)	work clothes (noun)
(usually plural) work clothing consisting of denim trousers (usually with a bib and shoulder straps)	clothing worn for doing manual labor
a loose protective coverall or smock worn over ordinary clothing for dirty work

overall (adjective)	work clothes (adjective)
involving only main features
including everything