intensity vs intensity level

intensity and intensity level both are nouns.

Word	Noun	Adjective	Verb	Adverb
intensity	Yes	No	No	No
intensity level	Yes	No	No	No

As nouns, intensity and intensity level are synonyms defined as:

intensity and intensity level: the amount of energy transmitted (as by acoustic or electromagnetic radiation)

Other synonyms of intensity include strength.

intensity (noun)	intensity level (noun)
high level or degree; the property of being intense	the amount of energy transmitted (as by acoustic or electromagnetic radiation)
chromatic purity: freedom from dilution with white and hence vivid in hue
the magnitude of sound (usually in a specified direction)
the amount of energy transmitted (as by acoustic or electromagnetic radiation)