illumination vs clarification

illumination and clarification both are nouns.

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

As nouns, illumination and clarification are synonyms defined as:

illumination and clarification: an interpretation that removes obstacles to understanding

Other synonyms of illumination include elucidation.

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