rip off vs goldbrick

rip off is not a noun while goldbrick is a noun.

Word	Noun	Adjective	Verb	Adverb
rip off	No	No	Yes	No
goldbrick	Yes	No	Yes	No

As verbs, goldbrick is a hyponym of rip off; that is, goldbrick is a word with a more specific, narrower meaning than rip off:

rip off (noun)	goldbrick (noun)
	anything that is supposed to be valuable but turns out to be worthless
	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

rip off (verb)	goldbrick (verb)
remove by pulling or ripping violently and forcefully	avoid (one's assigned duties)
take without the owner's consent	deprive of by deceit
deprive somebody of something by deceit