General synonyms:
* Simple
* Effortless
* Uncomplicated
* Straightforward
* Smooth
* Relaxed
* Comfortable
* Light
* Breezy
Synonyms for "easy" in a physical sense:
* Comfortable
* Soft
* Gentle
* Loose
Synonyms for "easy" in a mental sense:
* Simple
* Clear
* Straightforward
* Understandable
* Effortless
* Relaxed
Synonyms for "easy" in a social sense:
* Friendly
* Approachable
* Laid-back
* Unpretentious
* Unintimidating
Synonyms for "easy" in a financial sense:
* Affordable
* Inexpensive
* Cheap
Informal synonyms:
* Piece of cake
* No sweat
* A walk in the park
* Easy peasy
To choose the best synonym, consider the specific situation and the intended meaning.