Advent vs season

Advent and season both are nouns.

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

As nouns, season is a hypernym of Advent; that is, season is a word with a broader meaning than Advent:

Advent (noun)	season (noun)
(Christian theology) the reappearance of Jesus as judge for the Last Judgment	one of the natural periods into which the year is divided by the equinoxes and solstices or atmospheric conditions
the season including the four Sundays preceding Christmas	a recurrent time marked by major holidays
	a period of the year marked by special events or activities in some field

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