do-nothing vs layabout

do-nothing and layabout both are nouns.

Word	Noun	Adjective	Verb	Adverb
do-nothing	Yes	Yes	No	No
layabout	Yes	No	No	No

As nouns, do-nothing and layabout are synonyms defined as:

Other synonyms of do-nothing include bum, idler, loafer.

do-nothing (noun)	layabout (noun)
person who does no work	person who does no work

do-nothing (adjective)	layabout (adjective)
characterized by inability or unwillingness to work toward a goal or assume responsibility