diminutiveness vs tininess

diminutiveness and tininess both are nouns.

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

As nouns, diminutiveness and tininess are synonyms defined as:

Other synonyms of diminutiveness include minuteness, petiteness, weeness.

diminutiveness (noun)	tininess (noun)
the property of being very small in size	the property of being very small in size