ultraviolet radiation vs ultraviolet illumination

ultraviolet radiation and ultraviolet illumination both are nouns.

Word	Noun	Adjective	Verb	Adverb
ultraviolet radiation	Yes	No	No	No
ultraviolet illumination	Yes	No	No	No

As nouns, ultraviolet radiation and ultraviolet illumination are synonyms defined as:

ultraviolet radiation and ultraviolet illumination: radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays

Other synonyms of ultraviolet radiation include ultraviolet, ultraviolet light, UV.

ultraviolet radiation (noun)	ultraviolet illumination (noun)
radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays	radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays