weeness vs diminutiveness

weeness and diminutiveness both are nouns.

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

As nouns, weeness and diminutiveness are synonyms defined as:

Other synonyms of weeness include minuteness, petiteness, tininess.

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