What is a synonym for perfect?

There isn't one single perfect synonym for "perfect" because its meaning can be nuanced depending on the context. Here are some options depending on what you're trying to convey:

For general excellence:

* Ideal

* Flawless

* Immaculate

* Faultless

* Exemplary

* Supreme

* Unsurpassed

For completeness:

* Whole

* Complete

* Total

For accuracy:

* Precise

* Exact

For happiness:

* Blissful

* Ecstatic

For beauty:

* Stunning

* Gorgeous

* Magnificent

For specific situations:

* Optimal (for best possible outcome)

* Ultimate (for the highest level)

The best synonym will depend on the specific context and the nuance you want to convey.