Fool and Foolish
Incorrect : I said that he was a foolish.
Correct : I said that he was a fool.
Incorrect : He was absolutely fool.
Correct : He was absolutely foolish.
Note: "Fool' is a singular countable noun and cannot be used without a determiner before it. On the other hand, “foolish' is an adjective and does not take any determiner before it.
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