mock vs cod

mock and cod both are nouns.

Word	Noun	Adjective	Verb	Adverb
mock	Yes	Yes	Yes	No
cod	Yes	Yes	Yes	No

As verbs, cod is a hyponym of mock; that is, cod is a word with a more specific, narrower meaning than mock:

mock (noun)	cod (noun)
the act of mocking or ridiculing	major food fish of Arctic and cold-temperate waters
	lean white flesh of important North Atlantic food fish; usually baked or poached
	the vessel that contains the seeds of a plant (not the seeds themselves)

mock (adjective)	cod (adjective)
constituting a copy or imitation of something	payable by the recipient on delivery

mock (verb)	cod (verb)
treat with contempt	harass with persistent criticism or carping
imitate with mockery and derision	fool or hoax