low temperature vs coldness

low temperature and coldness both are nouns.

Word	Noun	Adjective	Verb	Adverb
low temperature	Yes	No	No	No
coldness	Yes	No	No	No

As nouns, low temperature and coldness are synonyms defined as:

Other synonyms of low temperature include cold, frigidity, frigidness.

low temperature (noun)	coldness (noun)
the absence of heat	the absence of heat
	a lack of affection or enthusiasm
	the sensation produced by low temperatures