warmth vs warmness

warmth and warmness both are nouns.

Word	Noun	Adjective	Verb	Adverb
warmth	Yes	No	No	No
warmness	Yes	No	No	No

As nouns, warmth and warmness are synonyms defined as:

warmth (noun)	warmness (noun)
a quality proceeding from feelings of affection or love	the quality of having a moderate degree of heat
the quality of having a moderate degree of heat	a positive feeling of liking
the trait of being intensely emotional
the sensation caused by heat energy
a warmhearted feeling