foul shot vs penalty free throw

foul shot and penalty free throw both are nouns.

Word	Noun	Adjective	Verb	Adverb
foul shot	Yes	No	No	No
penalty free throw	Yes	No	No	No

As nouns, foul shot and penalty free throw are synonyms defined as:

foul shot and penalty free throw: an unhindered basketball shot from the foul line; given to penalize the other team for committing a foul

Other synonyms of foul shot include charity shot, charity throw, charity toss, free throw.

foul shot (noun)	penalty free throw (noun)
an unhindered basketball shot from the foul line; given to penalize the other team for committing a foul	an unhindered basketball shot from the foul line; given to penalize the other team for committing a foul