Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
warmness is a noun meaning "a positive feeling of liking". It carries 2 recorded senses.
a positive feeling of liking
“he had trouble expressing the affection he felt”
“the child won everyone's heart”
“the warmness of his welcome made us feel right at home”
the quality of having a moderate degree of heat
“an agreeable warmth in the house”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for warmness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.