hybrid vigor vs heterosis

hybrid vigor and heterosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
hybrid vigor	Yes	No	No	No
heterosis	Yes	No	No	No

As nouns, hybrid vigor and heterosis are synonyms defined as:

hybrid vigor and heterosis: (genetics) the tendency of a crossbred organism to have qualities superior to those of either parent

hybrid vigor (noun)	heterosis (noun)
(genetics) the tendency of a crossbred organism to have qualities superior to those of either parent	(genetics) the tendency of a crossbred organism to have qualities superior to those of either parent