astronomical year vs equinoctial year

astronomical year and equinoctial year both are nouns.

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

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

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

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

astronomical year (noun)	equinoctial 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