slightness vs puniness

slightness and puniness both are nouns.

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

As nouns, slightness and puniness are synonyms defined as:

slightness and puniness: the quality of being unimportant and petty or frivolous

Other synonyms of slightness include pettiness, triviality.

slightness (noun)	puniness (noun)
slenderness	smallness of stature
the property of an attractively thin person	the quality of being unimportant and petty or frivolous
the quality of being unimportant and petty or frivolous