equinoctial year vs tropical year

equinoctial year and tropical year both are nouns.

Word	Noun	Adjective	Verb	Adverb
equinoctial year	Yes	No	No	No
tropical year	Yes	No	No	No

As nouns, equinoctial year and tropical year are synonyms defined as:

equinoctial year and tropical year: the time for the earth to make one revolution around the sun, measured between two vernal equinoxes

Other synonyms of equinoctial year include astronomical year, solar year.

equinoctial year (noun)	tropical year (noun)
the time for the earth to make one revolution around the sun, measured between two vernal equinoxes	the time for the earth to make one revolution around the sun, measured between two vernal equinoxes