illuminate vs adorn

illuminate and adorn both are verbs.

Word	Noun	Adjective	Verb	Adverb
illuminate	No	No	Yes	No
adorn	No	No	Yes	No

As verbs, adorn is a hypernym of illuminate; that is, adorn is a word with a broader meaning than illuminate:

Other hypernyms of illuminate include beautify, decorate, embellish, grace, ornament.

illuminate (verb)	adorn (verb)
introduce light into	make more attractive by adding ornament, colour, etc.
make free from confusion or ambiguity; make clear	furnish with power or authority; of kings or emperors
add embellishments and paintings to (medieval manuscripts)	be beautiful to look at