Difference between Foolish and Fatuous

FOOLISH vs FATUOUS: ADJECTIVE

Devoid of good sense or judgment
Lacking or exhibiting a lack of good sense or judgment; silly.
Capable of arousing laughter; absurd or ridiculous.
Embarrassed; abashed.
Insignificant; trivial.
Marked with, or exhibiting, folly; void of understanding; weak in intellect; without judgment or discretion; silly; unwise.
Such as a fool would do; proceeding from weakness of mind or silliness; exhibiting a want of judgment or discretion.
Absurd; ridiculous; despicable; contemptible.
Lacking good sense or judgement; unwise.
Resembling or characteristic of a fool.
Having or revealing stupidity

Like a fool; manifesting folly; deficient in understanding, sense, or discretion; weak in intellect or judgment; unwise.
Proceeding from or prompted by folly; exhibiting a want of discretion or discrimination; silly; vain; trifling.
Ridiculous; contemptible.
Denoting or indicative of folly.
Slight; insignificant.
Synonyms Silly, Foolish (see absurd); shallow, brainless, harebrained, simple.

Extremely silly or stupid
Unreal; illusory, like the ignis fatuus.
Idiotic; demented; imbecile.
Foolish; foolishly conceited; feebly or stupidly self-sufficient; unconsciously silly: applied both to persons and to their acts.

Insane, Nonsensical, Unreasonable, Harebrained, Fatuous, Fool, Preposterous, Absurd, Asinine, Ridiculous, Misguided, Ludicrous, Silly, Stupid, Unwise

Vapid, Moronic, Risible, Preposterous, Puerile, Absurd, Ludicrous, Nonsensical, Idiotic, Stupide, Foolish, Mindless, Asinine, Inane, Vacuous

Insane, Nonsensical, Unreasonable, Harebrained, Fatuous, Fool, Preposterous, Absurd, Asinine, Ridiculous, Misguided, Ludicrous, Silly, Stupid, Unwise

Vapid, Moronic, Risible, Preposterous, Puerile, Absurd, Ludicrous, Nonsensical, Idiotic, Stupide, Foolish, Mindless, Asinine, Inane, Vacuous

Anyone not using the AMEX deal is foolish.
MASTER: That would be very foolish of you.
Are Economic Giants Penny Wise But Pound Foolish?
Baloo knows it; I know it; the Pack know it; and even the foolish, foolish deer know.
So, the preaching of the gospel is not foolish, but the question today is: Is there such a thing as foolish preaching?
You looked foolish the last two times you said it for the previous two contracts, and you will look foolish again this time.
Of all the foolish Fears of Humankind, Fear of the Future is by far the most foolish.
There are no foolish trades, there are only foolish people.
Young and Foolish Young and foolish Why is it wrong to be Young and foolish?
That foolish idea may not be so foolish after all.

Its fatuous little light will be assuredly the last to leave them always assuming they are darkward bound.
It is fatuous to say they are not forced to accept government funds.
That is the most fatuous of many such remarks I have heard at Academy meetings.
Speaking of rank, can you recall the classic film that featured a fatuous Lt.
He made the fatuous promise to freeze energy prices if elected in 2015.
But piously repeating yourself, without support for your idea, sounds fatuous.
He is far too intelligent to utter such fatuous remarks.
Just maybe, I was replying to Annoyme's fatuous claim.
His arguments really are so presumptuous, convenient, vague and fatuous.
These adamant defenses of tepid democracy are not fatuous.