Observe with attention.

synonym: watch.

Roget 186: exist in space, be present etc. adj.; assister^†; make one of, make one at; look on, attend, remain; find oneself, present oneself; show one's face; fall in the way of, occur in a place; lie, stand; occupy; be there.    people; inhabit, dwell, reside, stay, sojourn, live, abide, lodge, nestle, roost, perch; take up one's abode etc. (be located) 184; tenant.    resort to, frequent, haunt; revisit.    fill, pervade, permeate; be diffused, be disseminated, be through; over spread, overrun; run through; meet one at every turn.    ... show more

Roget 444: witness, behold etc. (see) 441; look on etc. (be present) 186; gawk, rubber [Slang], rubberneck [U.S.].   

Look on as or consider.

synonyms: be known as, esteem, know as, look upon, regard as, repute, take to be, think of.

Roget 441: see, behold, discern, perceive, have in sight, descry, sight, make out, discover, distinguish, recognize, spy, espy, ken [Scot.]; get a sight of, have a sight of, catch a sight of, get a glimpse of, have a glimpse of, catch a glimpse of; command a view of; witness, contemplate, speculate; cast the eyes on, set the eyes on; be a spectator of etc. 444; look on etc. (be present) 186; see sights etc. (curiosity) 455; see at a glance etc. (intelligence) 498.    look, view, eye; lift up the eyes, open one's eye; look at, look on, look upon, look over, look about one, look round; survey, scan, inspect; run the eye over, run the eye through; reconnoiter, glance round, glance on, glance over turn one's looks upon, bend one's looks upon; direct the eyes to, turn the eyes on, cast a glance.    observe etc. (attend to) 457; watch etc. (care) 459; see with one's own eyes; watch for etc. (expect) 507; peep, peer, pry, take a peep; play at bopeep^†.    look full in the face, look hard at, look intently; strain one's eyes; fix the eyes upon, rivet the eyes upon; stare, gaze; pore over, gloat on; leer, ogle, glare; goggle; cock the eye, squint, gloat, look askance.    ... show more