doorbell(n = noun.artifact) bell, buzzer - a push button at an outer door that gives a ringing or buzzing signal when pushed;
is a kind of button, push, push button
has particulars: night bell

doorbell, n. a bell in a house etc. rung by visitors outside to signal their arrival.

N  resonance, ring, ringing, tintinabulation, reflexion, reflection, reverberation, echo, reecho, zap, zot, buzz (hiss), low note, base note, bass note, flat note, grave note, deep note, bass, basso, basso profondo, baritone, barytone, contralto, echo chamber, resonator, tinnitus, bell, doorbell, buzzer, gong, cymbals (musical instruments), sympathetic vibrations, natural frequency, coupled vibration frequency, overtone, resonating cavity, sounding board, tuning fork, tuning, squelch, frequency selection, resonator, resonator circuit, radio resonant structure, aromaticity, alternating double bonds, non-bonded resonance, pi clouds, unsaturation, double bond, (valence), resounding, resonant, reverberant, tinnient, tintinnabulary, sonorous, booming, deep-toned, deep-sounding, deep-mouthed, vibrant, hollow, sepulchral, gruff, sweet bells jangled, out of time and harsh, echoing down the mountain and through the dell.