goldbrick vs layabout

goldbrick and layabout both are nouns.

Word	Noun	Adjective	Verb	Adverb
goldbrick	Yes	No	Yes	No
layabout	Yes	No	No	No

As nouns, layabout is a hypernym of goldbrick; that is, layabout is a word with a broader meaning than goldbrick:

Other hypernyms of goldbrick include bum, do-nothing, idler, loafer.

goldbrick (noun)	layabout (noun)
anything that is supposed to be valuable but turns out to be worthless	person who does no work
a brick-shaped block that looks like gold but is not
an idle worthless person
a soldier who performs his duties without proper care or effort

goldbrick (verb)	layabout (verb)
avoid (one's assigned duties)
deprive of by deceit