adequacy vs ampleness

adequacy and ampleness both are nouns.

Word	Noun	Adjective	Verb	Adverb
adequacy	Yes	No	No	No
ampleness	Yes	No	No	No

As nouns, ampleness is a hyponym of adequacy; that is, ampleness is a word with a more specific, narrower meaning than adequacy:

adequacy: the quality of being sufficient for the end in view
ampleness: the property of being more than sufficient; comfortable sufficiency

adequacy (noun)	ampleness (noun)
the quality of being able to meet a need satisfactorily:	the property of impressive largeness in size
the quality of being sufficient for the end in view	the property of being more than sufficient; comfortable sufficiency