feet, feat

Feet or feet is the plural ( more than one ) form of "foot"--the foot you walk on, the foot of a thing or device,or foot as a unit of measurement --
He seems to have two left feet today.
That old table has ball and claw feet.
We need a garden fence about 8 feet long.

Feat or feat ( rhymes with feet ) means an outstanding exploit or accomplishment, usually physical--
The rescue was lauded in the press as a feat of daring and courage.
The runner won a medal for his feat of endurance.

Now that you know that, you can say--
"Throwing the anvil 10 feet was considered a great feat."

Note--the plural ( more than one ) of "feat" is "feats"--
He was awarded a trophy for his feats of strength.
Note# 2--"feet" is already plural ( more than one ), and would agree with a plural ( you, we, they ) form of a verb ( action word )--
His feet are too big.
"Feet" as a unit of measurement may be the subject ( actor ) in a sentence, and agree with a plural verb--
There are six feet of string left. ( the plural "are" refers to "six feet"--also plural )
Or "feet" as a unit of measurement may be the object ( acted upon ), and the verb would agree with the subject--
This string is six feet long. ( The subject of the sentence is "string"--singular )