immersion vs focus

immersion and focus both are nouns.

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

As nouns, focus is a hyponym of immersion; that is, focus is a word with a more specific, narrower meaning than immersion:

Other hyponyms of immersion include centering, centring, direction, focal point, focusing, focussing, specialism, study.

immersion (noun)	focus (noun)
a form of baptism in which part or all of a person's body is submerged	maximum clarity or distinctness of an image rendered by an optical system
the act of wetting something by submerging it	maximum clarity or distinctness of an idea
complete attention; intense mental effort	the concentration of attention or energy on something
sinking until covered completely with water	a fixed reference point on the concave side of a conic section
(astronomy) the disappearance of a celestial body prior to an eclipse	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

immersion (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