What are synonyms of fantastic?

Here are some synonyms for "fantastic" depending on the context:

General Positive:

* Amazing

* Wonderful

* Splendid

* Brilliant

* Excellent

* Terrific

* Superb

* Outstanding

* Marvelous

* Fabulous

* Impressive

* Remarkable

More Imaginative/Whimsical:

* Enchanting

* Magical

* Dreamlike

* Surreal

* Unbelievable

* Extraordinary

For Things:

* Exceptional

* Phenomenal

* Superb

* Top-notch

For Experiences:

* Thrilling

* Exciting

* Mind-blowing

* Unforgettable

More Informal:

* Awesome

* Rad

* Sweet

* Cool

* Epic

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