Synonyms and related words :
Roman candle, aid to navigation, alarm, amber light, balefire, bat, bat the eyes, beacon, beacon fire, beat the drum, bell, bell buoy, blanket drill, blink, blinker, blue peter, breath, broad hint, buoy, cast, cat nap, caution light, clue, coup, crack, cue, dash, dip, exchange colors, flag, flag down, flare, flash, flutter, fog bell, fog signal, fog whistle, foghorn, forty winks, gentle hint, gesture, give a signal, give the nod, glance, glimmer, glimmering, glimpse, go light, gong buoy, green light, hail, hail and speak, half a jiffy, half a mo, half a second, half a shake, half an eye, half-mast, heliograph, high sign, hint, hoist a banner, implication, index, indication, inkling, innuendo, insinuation, instant, international alphabet flag, international numeral pennant, intimation, jiff, jiffy, kick, leer, look, make a sign, marker beacon, microsecond, millisecond, minute, moment, nap, nictitate, nod, nudge, parachute flare, peek, peep, pilot flag, poke, police whistle, prompt, quarantine flag, quick sight, radio beacon, raise a cry, rapid glance, red flag, red light, rocket, sailing aid, salute, scent, sec, second, semaphore, semaphore flag, semaphore telegraph, shade, shake, siesta, sign, signal, signal beacon, signal bell, signal fire, signal flag, signal gong, signal gun, signal lamp, signal light, signal mast, signal post, signal rocket, signal shot, signal siren, signal tower, signalize, slant, smack, snooze, sound an alarm, sound the trumpet, soupcon, spar buoy, speak, split second, spoor, spot of sleep, squinch, squint, squiz, stop light, stroke, suggestion, suspicion, symptom, telltale, the nod, the wink, tick, touch, trace, track, traffic light, traffic signal, trice, twink, twinkle, twinkling, twitch, two shakes, unfurl a flag, watch fire, wave, wave a flag, wave the hand, whisper, white flag, wigwag, wigwag flag, wink of sleep, yellow flag