vicious circle vs regeneration

vicious circle and regeneration both are nouns.

Word	Noun	Adjective	Verb	Adverb
vicious circle	Yes	No	No	No
regeneration	Yes	No	No	No

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

Other hypernyms of vicious circle include positive feedback.

vicious circle (noun)	regeneration (noun)
an argument that assumes that which is to be proved	the activity of spiritual or physical renewal
one trouble leads to another that aggravates the first	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