solar year vs equinoctial year

solar year and equinoctial year both are nouns.

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

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

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

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

solar 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