propagation vs biogeny

propagation and biogeny both are nouns.

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

As nouns, biogeny is a hyponym of propagation; that is, biogeny is a word with a more specific, narrower meaning than propagation:

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

Other hyponyms of propagation include biogenesis.

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