buzz·er 
(bŭzər)
(bŭzər)n.
An electric signaling device, such as a doorbell, that makes a buzzing sound.
- heartland
- heartless
- heartlessly
- heartlessness
- heart-lung machine
- heart massage
- heart of palm
- heart rate
- heart-rending
- heartrending
- Heart River
- heart-searching
- heartsease
- heart's-ease
- heartsick
- heartsickness
- heart-stricken
- heartstring
- heart-struck
- heartthrob
- heart-to-heart
- heartwarming
- heartwood
- heartworm
- hearty