gouge vs gazump

gouge is a noun but gazump is not a noun.

Word	Noun	Adjective	Verb	Adverb
gouge	Yes	No	Yes	No
gazump	No	No	Yes	No

As verbs, gazump is a hypernym of gouge; that is, gazump is a word with a broader meaning than gouge:

Other hypernyms of gouge include fleece, hook, overcharge, pluck, plume, rob, soak, surcharge.

gouge (noun)	gazump (noun)
the act of gouging
and edge tool with a blade like a trough for cutting channels or grooves
an impression in a surface (as made by a blow)

gouge (verb)	gazump (verb)
force with the thumb	rip off; ask an unreasonable price
make a groove in	raise the price of something after agreeing on a lower price
obtain by coercion or intimidation