There are differences, but it can be hard to explain fully at times! These aren’t exact definitions but synonyms. They share and/or have meanings somewhere along the same line. When describing a person: Amazing – really cool, awesome, fascinating, incredible, marvellous, prodigious, shocking Nice – admirable, amiable, approved, attractive, charming Good – good Another example: Rocks (informal) – really cool, amazing, incredible [He rocks!] I hope this helps