tip-off vs tap-off

tip-off and tap-off both are nouns.

Word	Noun	Adjective	Verb	Adverb
tip-off	Yes	No	No	No
tap-off	Yes	No	No	No

As nouns, tip-off and tap-off are synonyms defined as:

tip-off and tap-off: the act of starting a basketball game with a jump ball

tip-off (noun)	tap-off (noun)
the act of starting a basketball game with a jump ball	the act of starting a basketball game with a jump ball
inside information that something is going to happen