What is a synonym for the word encouraging?

Here are some synonyms for "encouraging," depending on the specific nuance you want to convey:

General:

* Inspiring

* Motivating

* Uplifting

* Heartening

* Cheerful

* Hopeful

* Optimistic

More formal:

* Reinforcing

* Strengthening

* Bolstering

More informal:

* Cheering up

* Giving hope

* Giving a boost

Other options:

* Supportive

* Comforting

* Reassuring

The best synonym for "encouraging" will depend on the context of your sentence.