Nouns

(n)focus, focusing, focussing, focal point, direction, centering, centringthe concentration of attention or energy on something“the focus of activity shifted to molecular biology”, “he had no direction in his life”
(n)focusmaximum clarity or distinctness of an image rendered by an optical system“in focus”, “out of focus”
(n)focusmaximum clarity or distinctness of an idea“the controversy brought clearly into focus an important difference of opinion”
(n)focus, focal point, nidusa central point or locus of an infection in an organism“the focus of infection”
(n)stress, focusspecial emphasis attached to something“the stress was more on accuracy than on speed”
(n)focus, focal pointa point of convergence of light (or other radiation) or a point from which it diverges
(n)focusa fixed reference point on the concave side of a conic section

Verbs

(v)concentrate, focus, center, centre, pore, rivetdirect one's attention on something“Please focus on your studies and not on your hobbies”
(v)focuscause to converge on or toward a central point“Focus the light on this image”
(v)concenter, concentre, focalize, focalise, focusbring into focus or alignment; to converge or cause to converge; of ideas or emotions
(v)focus, focalize, focalisebecome focussed or come into focus“The light focused”
(v)focus, focalize, focalise, sharpenput (an image) into focus“Please focus the image: we cannot enjoy the movie”