year vs season

year and season both are nouns.

Word	Noun	Adjective	Verb	Adverb
year	Yes	No	No	No
season	Yes	No	Yes	No

year (noun)	season (noun)
a body of students who graduate together	one of the natural periods into which the year is divided by the equinoxes and solstices or atmospheric conditions
the period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun	a recurrent time marked by major holidays
a period of time containing 365 (or 366) days	a period of the year marked by special events or activities in some field
a period of time occupying a regular part of a calendar year that is used for some particular activity

year (verb)	season (verb)
	make healthy
	make more temperate, acceptable, or suitable by adding something else
	lend flavor to