re-formation vs regeneration

re-formation and regeneration both are nouns.

Word	Noun	Adjective	Verb	Adverb
re-formation	Yes	No	No	No
regeneration	Yes	No	No	No

As nouns, re-formation and regeneration are synonyms defined as:

re-formation and regeneration: forming again (especially with improvements or removal of defects); renewing and reconstituting

re-formation (noun)	regeneration (noun)
forming again (especially with improvements or removal of defects); renewing and reconstituting	the activity of spiritual or physical renewal
	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