heartbeat (n.)

• anima
• arrhythmia
• atman
• beat
• beating
• blood
• breath
• drumming
• flutter
• heart
• heartthrob
• lifeblood
• palpitation
• pitter-patter
• pulsation
• pulse
• rat-a-tat
• rataplan
• rhythm
• soul
• spirit
• tempo
• throb
• throbbing