focal point vs focus

focal point and focus both are nouns.

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

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

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

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

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

focal point and focus: a point of convergence of light (or other radiation) or a point from which it diverges

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

focal point and focus: a central point or locus of an infection in an organism

Other synonyms of focal point include nidus.

focal point (noun)	focus (noun)
the concentration of attention or energy on something	maximum clarity or distinctness of an image rendered by an optical system
a point of convergence of light (or other radiation) or a point from which it diverges	maximum clarity or distinctness of an idea
a central point or locus of an infection in an organism	the concentration of attention or energy on something
	a fixed reference point on the concave side of a conic section
	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
	special emphasis attached to something

focal point (verb)	focus (verb)
	become focussed or come into focus
	put (an image) into focus
	direct one's attention on something
	bring into focus or alignment; to converge or cause to converge; of ideas or emotions
	cause to converge on or toward a central point