positive feedback vs regeneration

positive feedback and regeneration both are nouns.

Word	Noun	Adjective	Verb	Adverb
positive feedback	Yes	No	No	No
regeneration	Yes	No	No	No

As nouns, positive feedback and regeneration are synonyms defined as:

positive feedback and regeneration: feedback in phase with (augmenting) the input

positive feedback (noun)	regeneration (noun)
feedback in phase with (augmenting) the input	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