high temperature vs temperature

high temperature and temperature both are nouns.

Word	Noun	Adjective	Verb	Adverb
high temperature	Yes	No	No	No
temperature	Yes	No	No	No

As nouns, temperature is a hypernym of high temperature; that is, temperature is a word with a broader meaning than high temperature:

high temperature: the presence of heat
temperature: the degree of hotness or coldness of a body or environment (corresponding to its molecular activity)

high temperature (noun)	temperature (noun)
the presence of heat	the degree of hotness or coldness of a body or environment (corresponding to its molecular activity)
	the somatic sensation of cold or heat