alternation of generations vs xenogenesis

alternation of generations and xenogenesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
alternation of generations	Yes	No	No	No
xenogenesis	Yes	No	No	No

As nouns, alternation of generations and xenogenesis are synonyms defined as:

alternation of generations and xenogenesis: the alternation of two or more different forms in the life cycle of a plant or animal

Other synonyms of alternation of generations include heterogenesis.

alternation of generations (noun)	xenogenesis (noun)
the alternation of two or more different forms in the life cycle of a plant or animal	the alternation of two or more different forms in the life cycle of a plant or animal