biogeny vs propagation

biogeny and propagation both are nouns.

Word	Noun	Adjective	Verb	Adverb
biogeny	Yes	No	No	No
propagation	Yes	No	No	No

As nouns, propagation is a hypernym of biogeny; that is, propagation is a word with a broader meaning than biogeny:

biogeny: the production of living organisms from other living organisms
propagation: the act of producing offspring or multiplying by such production

Other hypernyms of biogeny include generation, multiplication.

biogeny (noun)	propagation (noun)
the production of living organisms from other living organisms	the act of producing offspring or multiplying by such production
	the spreading of something (a belief or practice) into new regions
	the movement of a wave through a medium