successor vs progeny

successor and progeny both are nouns.

Word	Noun	Adjective	Verb	Adverb
successor	Yes	No	No	No
progeny	Yes	No	No	No

As nouns, progeny is a hypernym of successor; that is, progeny is a word with a broader meaning than successor:

Other hypernyms of successor include issue, offspring.

successor (noun)	progeny (noun)
a thing or person that immediately replaces something or someone	the immediate descendants of a person
a person who inherits some title or office
a person who follows next in order