charity shot vs penalty free throw

charity shot and penalty free throw both are nouns.

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

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

charity 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 charity shot include charity throw, charity toss, foul shot, free throw.

charity 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