puniness vs littleness

puniness and littleness both are nouns.

Word	Noun	Adjective	Verb	Adverb
puniness	Yes	No	No	No
littleness	Yes	No	No	No

As nouns, littleness is a hypernym of puniness; that is, littleness is a word with a broader meaning than puniness:

Other hypernyms of puniness include smallness.

puniness (noun)	littleness (noun)
smallness of stature	the property of having a relatively small size
the quality of being unimportant and petty or frivolous	lack of generosity in trifling matters
	the property of having relatively little strength or vigor