Perfectibility vs Perfectibilist - What's the difference?

As nouns the difference between perfectibility and perfectibilist

is that perfectibility is the possibility of achieving perfection while perfectibilist is a believer in perfectibility.

(perfectibilities)

The possibility of achieving perfection.

In a project involving many people, maintainability is a more useful asset than perfectibility .

(en noun)

A believer in perfectibility.

* utopianist

* optimist