IM putting in a water feature, the pump has a 3/4 in. out flow , the water feature has a 2in. Pvc tube for water flow. I need to connect these two ,to make my wife happy.

The water feature has a 2" input line? That sounds way too big.

Not even whole houses have a 2" input to the house for water supply. City supply lines that go into houses are typically just 3/4"-1".

You can guy parts to convert from 3/4" to 2" but my guess is that you'll end up with a pressure problem. The motor that circulates the water for your "water feature" may not work correctly.

If I were you I'd go back to the place where you got the water feature motor and explain this issue to them... to see what they say.