General Synonyms:
* Beautiful
* Lovely
* Charming
* Attractive
* Pleasing
* Delightful
* Nice
* Handsome (for men or things)
* Stunning
* Gorgeous
* Elegant
* Exquisite
* Appealing
Informal Synonyms:
* Cute
* Sweet
* Nice-looking
* Good-looking
* Fair
* Decent
Synonyms for Describing a Degree or Amount:
* Fairly
* Rather
* Somewhat
* Moderately
* Quite
* Very
More Specific Synonyms:
* Elegant (for clothes, design)
* Sophisticated (for a style)
* Striking (for something that stands out)
* Alluring (for something captivating)
* Dainty (for something delicate)
The best synonym to use will depend on the specific context and the desired level of formality.