centre of attention vs center of attention

centre of attention and center of attention both are nouns.

Word	Noun	Adjective	Verb	Adverb
centre of attention	Yes	No	No	No
center of attention	Yes	No	No	No

As nouns, centre of attention and center of attention are synonyms defined as:

centre of attention and center of attention: the object upon which interest and attention focuses

Other synonyms of centre of attention include center, centre.

centre of attention (noun)	center of attention (noun)
the object upon which interest and attention focuses	the object upon which interest and attention focuses