Difference between Foolish and Idiot

FOOLISH vs IDIOT: NOUN

A person of subnormal intelligence
A person who is considered foolish or stupid.
A person of profound mental retardation having a mental age below three years and generally unable to learn connected speech or guard against common dangers. The term belongs to a classification system no longer in use and is now considered offensive.
A private person.
An unlearned, ignorant, or simple person.
A fool or dupe; one who is fooled.
A professional fool; a jester; a clown.
A human being destitute of the ordinary mental powers; one who is born without understanding or discernment, or who has utterly lost it by disease, so as to have no lucid intervals; one who, by deficiency of the intellectual faculties, is unfit for the social condition, or for taking care of himself in danger.
In old English law, one who has been without understanding or reasoning powers from his birth, as distinguished from a lunatic. “At the present day idiocy is considered as a species of insanity or lunacy.” (Rapalje and Lawrence.)
A man in private station, as distinguished from one holding a public office.
A fool; a simpleton; -- a term of reproach.
A common term for a person of low general intelligence.
A medical or psychological term meaning a person who lacks the capacity to develop beyond the mental age of a normal four-year-old.

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

Synonyms Silly, Foolish (see absurd); shallow, brainless, harebrained, simple.
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.

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

Idiotic, Dickhead, Nitwit, Twit, Arsehole, Dolt, Stupid, Dumbass, Jackass, Half wit, Changeling, Retard, Cretin, Imbecile, Moron

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

Twat, Idiotic, Dickhead, Nitwit, Twit, Arsehole, Dolt, Stupid, Dumbass, Jackass, Changeling, Retard, Cretin, Imbecile, Moron

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.

May be im the worst type of idiot, but can I say you are the best kind of idiot.
The only way you become not an idiot is learning why you were an idiot.
One thing seems to be sure: an idiot today is equal to an idiot back then.
Unfortunately we have an idiot president and a lot of idiot governors, and so cases in this country are surging.
Unfortunately, in this case, the negative implications go way beyond the idiot who decided to be an idiot.
A friend once told me any idiot can be uncomfortable and I am prepared to be that idiot.
One idiot hires Nigerians to play the part of maga deplorables, and this idiot mistakes a Cuban immigrant democrat for another deplorable.
Well obviously you are an idiot for trusting an idiot.
If you make something idiot proof, someone will make a better idiot.
Any idiot who claims otherwise is just a fool, and yes, an idiot.