centring vs focusing

centring and focusing both are nouns.

Word	Noun	Adjective	Verb	Adverb
centring	Yes	No	No	No
focusing	Yes	No	No	No

As nouns, centring and focusing are synonyms defined as:

centring and focusing: the concentration of attention or energy on something

Other synonyms of centring include centering, direction, focal point, focus, focussing.

centring (noun)	focusing (noun)
(American football) putting the ball in play by passing it (between the legs) to a back	the act of bringing into focus
the concentration of attention or energy on something	the concentration of attention or energy on something