Different, exclusive, particular, rare, uncommon, or extraordinary. They mean unique.
Instead of using the word challenging you can use the word gifted, special, special gifted.
The word 'unique' is an adjective, a word used to describe a noun.An adjective can be used preceding the noun it describes.Example: My grandmother was a unique person for her time.An adjective can be a subject complement following a linking verb. A subject complement restates the subject of the sentence.Example: Your style is really unique. (style = unique)An adjective can be an object complement, a word following the direct object that restates it.Example: People considered Warhol's art unique. (art = unique)
Substitute or exchange can be used instead of replace.
Meaningless,Regulation or act,Formal,Rigid observation of rules and regulations,
The United States uses the word "fall" instead of "autumn" to refer to the season.
fustrating
ubiquitous
I apologize.
brainstorming
Protest
CLOSE
superb
make
coerced
its vital to use referncing
Or, Nor,both
astounding