weeness vs tininess

weeness and tininess both are nouns.

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

As nouns, weeness and tininess are synonyms defined as:

Other synonyms of weeness include diminutiveness, minuteness, petiteness.

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