tininess vs littleness

tininess and littleness both are nouns.

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

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

Other hypernyms of tininess include smallness.

tininess (noun)	littleness (noun)
the property of being very small in size	the property of having a relatively small size
	lack of generosity in trifling matters
	the property of having relatively little strength or vigor