night bell(n = noun.artifact) - a doorbell to be used at night;
is a kind of bell, buzzer, doorbell

alarm bell, alexander bell, alexander graham bell, alexander melville bell, angelus bell, bell, bell animalcule, bell apple, bell arch, bell bearer, bell book, bell buoy, bell captain, bell cot, bell cote, bell crank, bell deck, bell founder, bell foundry, bell gable, bell glass, bell heather, bell jar, bell magpie, bell metal, bell morel, bell pepper, bell process, bell push, bell ringer, bell ringing, bell seat, bell shape, bell system of control, bell tent, bell the cat, bell toad, bell tower, bird of night, black-crowned night heron, bonfire night, canterbury bell, church bell, currer bell, dead of night, death bell, dinner bell, diving bell, electric bell, every night, fairy bell, fire bell, good night, guest night, guy fawkes night, heather bell, honey bell, liberty bell, melville bell, midsummer night, night, night and day, night before christmas, night bird, night blindness, night court, night game, night heron, night jasmine, night jessamine, night latch, night letter, night lettergram, night life, night lizard, night owl, night porter, night raven, night rider, night school, night shift, night snake, night soil, night spot, night terror, night terrors, night vision, night watch, night watchman, opening night, peach bell, queen of the night, sancte bell, saturday night special, school bell, sheep bell, ship's bell, shop bell, silver bell, sleigh bell, st john's night, stink bell, telephone bell, this night, twelfth night, vanessa bell, very night signals, very's night signals, walpurgis night, warning bell, watch night, wedding night, willow bell, wind bell, yellow-crowned night heron