percentile vs centile

percentile and centile both are nouns.

Word	Noun	Adjective	Verb	Adverb
percentile	Yes	No	No	No
centile	Yes	No	No	No

As nouns, percentile and centile are synonyms defined as:

percentile and centile: (statistics) any of the 99 numbered points that divide an ordered set of scores into 100 parts each of which contains one-hundredth of the total

percentile (noun)	centile (noun)
(statistics) any of the 99 numbered points that divide an ordered set of scores into 100 parts each of which contains one-hundredth of the total	(statistics) any of the 99 numbered points that divide an ordered set of scores into 100 parts each of which contains one-hundredth of the total