cooler vs tank

cooler and tank both are nouns.

Word	Noun	Adjective	Verb	Adverb
cooler	Yes	No	No	No
tank	Yes	No	Yes	No

As nouns, cooler and tank are synonyms defined as:

cooler (noun)	tank (noun)
a refrigerator for cooling liquids	a large (usually metallic) vessel for holding gases or liquids
a cell for violent prisoners	an enclosed armored military vehicle; has a cannon and moves on caterpillar treads
an iced drink especially white wine and fruit juice	a freight car that transports liquids or gases in bulk
	a cell for violent prisoners
	as much as a tank will hold

cooler (verb)	tank (verb)
	treat in a tank
	consume excessive amounts of alcohol
	store in a tank by causing (something) to flow into it