Datapoint rhymes with:
appoint, disappoint, lapoint, lapointe, reappoint, appoint, disappoint, exclamation-point, lapoint, lapointe, pierpoint, point, pointe, reappoint
Datapoint sounds like:
daponte, debenedetto, deepened, defamed, defend, defended, defiant, defined, definite, defund, depend, depended, depinto, deponte, deviant, dibenedetto, dipinto, divinity, dupont