bellyful vs superabundance

bellyful and superabundance both are nouns.

Word	Noun	Adjective	Verb	Adverb
bellyful	Yes	No	No	No
superabundance	Yes	No	No	No

As nouns, superabundance is a hypernym of bellyful; that is, superabundance is a word with a broader meaning than bellyful:

Other hypernyms of bellyful include overabundance, overmuch, overmuchness.

bellyful (noun)	superabundance (noun)
an undesirable overabundance	a quantity that is more than what is appropriate