clarification vs illumination

clarification and illumination both are nouns.

Word	Noun	Adjective	Verb	Adverb
clarification	Yes	No	No	No
illumination	Yes	No	No	No

As nouns, clarification and illumination are synonyms defined as:

clarification and illumination: an interpretation that removes obstacles to understanding

Other synonyms of clarification include elucidation.

clarification (noun)	illumination (noun)
the act of removing solid particles from a liquid	painting or drawing included in a book (especially in illuminated medieval manuscripts)
an interpretation that removes obstacles to understanding	the luminous flux incident on a unit area
	an interpretation that removes obstacles to understanding
	the degree of visibility of your environment
	a condition of spiritual awareness; divine illumination