focussing vs focal point

focussing and focal point both are nouns.

Word	Noun	Adjective	Verb	Adverb
focussing	Yes	No	No	No
focal point	Yes	No	No	No

As nouns, focussing and focal point are synonyms defined as:

focussing and focal point: the concentration of attention or energy on something

Other synonyms of focussing include centering, centring, direction, focus, focusing.

focussing (noun)	focal point (noun)
the concentration of attention or energy on something	the concentration of attention or energy on something
	a point of convergence of light (or other radiation) or a point from which it diverges
	a central point or locus of an infection in an organism