slightness vs littleness

slightness and littleness both are nouns.

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

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

Other hypernyms of slightness include smallness.

slightness (noun)	littleness (noun)
slenderness	the property of having a relatively small size
the property of an attractively thin person	lack of generosity in trifling matters
the quality of being unimportant and petty or frivolous	the property of having relatively little strength or vigor