heterogenesis vs xenogenesis

heterogenesis and xenogenesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
heterogenesis	Yes	No	No	No
xenogenesis	Yes	No	No	No

As nouns, heterogenesis and xenogenesis are synonyms defined as:

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

Other synonyms of heterogenesis include alternation of generations.

heterogenesis (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