focusing vs centering

focusing and centering both are nouns.

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

As nouns, focusing and centering are synonyms defined as:

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

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

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