one-and-one vs free throw

one-and-one and free throw both are nouns.

Word	Noun	Adjective	Verb	Adverb
one-and-one	Yes	No	No	No
free throw	Yes	No	No	No

As nouns, free throw is a hypernym of one-and-one; that is, free throw is a word with a broader meaning than one-and-one:

one-and-one: a foul shot that must be made in order to earn the right to a second foul shot
free throw: an unhindered basketball shot from the foul line; given to penalize the other team for committing a foul

Other hypernyms of one-and-one include charity shot, charity throw, charity toss, foul shot, penalty free throw.

one-and-one (noun)	free throw (noun)
a foul shot that must be made in order to earn the right to a second foul shot	an unhindered basketball shot from the foul line; given to penalize the other team for committing a foul