cod vs gull

cod and gull both are nouns.

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

As verbs, cod and gull are synonyms defined as:

Other synonyms of cod include befool, dupe, fool, put on, put one across, put one over, slang, take in.

cod (noun)	gull (noun)
major food fish of Arctic and cold-temperate waters	mostly white aquatic bird having long pointed wings and short legs
lean white flesh of important North Atlantic food fish; usually baked or poached	a person who is gullible and easy to take advantage of
the vessel that contains the seeds of a plant (not the seeds themselves)

cod (adjective)	gull (adjective)
payable by the recipient on delivery

cod (verb)	gull (verb)
harass with persistent criticism or carping	fool or hoax
fool or hoax	make a fool or dupe of