warmness

noun

state of being warm

Wiktionary

noun

Etymology: From Middle English warmnesse, from Old English wearmnes (“warmness, warmth”), from Proto-West Germanic *warmnassī (“warmness, warmth”), equivalent to warm + -ness. Cognate with Scots warmnes (“warmness”), West Frisian waarmens (“warmness”), dialectal Dutch warmenesse, warmnis (“warmness”), German Low German Warmnis (“warmness”).

the state of being warm; warmth