floodlight vs illumine

floodlight is a noun but illumine is not a noun.

Word	Noun	Adjective	Verb	Adverb
floodlight	Yes	No	Yes	No
illumine	No	No	Yes	No

As verbs, illumine is a hypernym of floodlight; that is, illumine is a word with a broader meaning than floodlight:

Other hypernyms of floodlight include illume, illuminate, light, light up.

floodlight (noun)	illumine (noun)
light that is a source of artificial illumination having a broad beam; used in photography

floodlight (verb)	illumine (verb)
illuminate with floodlights	introduce light into