What is another word for unique?

Here are some words that can be used as alternatives to "unique," depending on the specific nuance you want to convey:

Similar meaning, but more formal:

* Singular

* Exceptional

* Distinctive

* Uncommon

* One-of-a-kind

* Unparalleled

* Unprecedented

More informal options:

* Special

* Different

* Original

* Unusual

* Odd (can be negative connotation)

* Peculiar (can be negative connotation)

Words emphasizing individuality:

* Individual

* Distinct

* Unconventional

* Unorthodox

Words emphasizing rarity:

* Rare

* Scarce

* Infrequent

The best alternative will depend on the context of your writing.