loudspeaker

• POS: Noun
• HYPHEN: loud=speak=er

CIDE DICTIONARY

loudspeaker, n. 

 A device which converts electrical signals into sounds loud enough to be heard at a distance, usually outdoors; it is used to amplify or transmit over a distance speech from a person, who is typically speaking into a microphone. Sometimes it is used to play recorded speech or music.  [WordNet 1.5]

OXFORD DICTIONARY

loudspeaker, n. an apparatus that converts electrical impulses into sound, esp. music and voice.

THESAURUS

loudspeaker

acoustical network, capacitor speaker, coaxial speaker, cone, crossover network, diaphragm, dynamic speaker, earphone, electrodynamic speaker, electromagnetic speaker, electrostatic speaker, excited-field speaker, full-fidelity speaker, headphone, headset, high-fidelity speaker, high-frequency speaker, horn, low-frequency speaker, midrange speaker, monorange speaker, moving-coil speaker, permanent magnet speaker, speaker, speaker system, speaker unit, triaxial speaker, tweeter, voice coil, woofer