regeneration vs resurgence

regeneration and resurgence both are nouns.

Word	Noun	Adjective	Verb	Adverb
regeneration	Yes	No	No	No
resurgence	Yes	No	No	No

As nouns, resurgence is a hypernym of regeneration; that is, resurgence is a word with a broader meaning than regeneration:

Other hypernyms of regeneration include revitalisation, revitalization, revival, revivification.

regeneration (noun)	resurgence (noun)
the activity of spiritual or physical renewal	bringing again into activity and prominence
forming again (especially with improvements or removal of defects); renewing and reconstituting
(biology) growth anew of lost tissue or destroyed parts or organs
feedback in phase with (augmenting) the input