Fatuous vs Benighted - What's the difference?

As adjectives the difference between fatuous and benighted

is that fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness while benighted is plunged into darkness.

(label)(benight).

(en adjective)

Obnoxiously stupid, vacantly silly, content in one's foolishness.

To compare the intelligence levels of men and women is itself fatuous .

* Refers especially to foolishness and disregard of reality.

* (obnoxiously stupid) childish, imbecilic, inane, insipid, puerile

(en adjective)

plunged into darkness

overtaken by night

* 1936 , Robert Frost, "Desert Places"

And lonely as it is, that loneliness

Will be more lonely ere it will be less —

A blanker whiteness of benighted snow

With no expression, nothing to express.

lacking knowledge or education; unenlightened

(head)

(label)(benight)