infrared radiation vs infrared emission

infrared radiation and infrared emission both are nouns.

Word	Noun	Adjective	Verb	Adverb
infrared radiation	Yes	No	No	No
infrared emission	Yes	No	No	No

As nouns, infrared radiation and infrared emission are synonyms defined as:

infrared radiation and infrared emission: electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves

Other synonyms of infrared radiation include infrared, infrared light.

infrared radiation (noun)	infrared emission (noun)
electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves	electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves