focus vs focalise

focus is a noun but focalise is not a noun.

Word	Noun	Adjective	Verb	Adverb
focus	Yes	No	Yes	No
focalise	No	No	Yes	No

As verbs, focus and focalise are synonyms defined as:

Other synonyms of focus include focalize.

As verbs, focus and focalise are synonyms defined as:

Other synonyms of focus include focalize, sharpen.

As verbs, focus and focalise are synonyms defined as:

focus and focalise: bring into focus or alignment; to converge or cause to converge; of ideas or emotions

Other synonyms of focus include concenter, concentre, focalize.

focus (noun)	focalise (noun)
maximum clarity or distinctness of an image rendered by an optical system
maximum clarity or distinctness of an idea
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

focus (verb)	focalise (verb)
become focussed or come into focus	become focussed or come into focus
put (an image) 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
bring into focus or alignment; to converge or cause to converge; of ideas or emotions	concentrate on a particular place or spot
cause to converge on or toward a central point