1. More active than normal
   - hyperactive, hyper

See also: active, overactivity

• heart rate
• heart rhythm
• heart specialist
• heart surgeon
• heart surgery
• heart urchin
• heart valve
• heart ventricle
• heart-healthy
• heart-leaved aster
• heart-lung machine
• heart-shaped
• heart-to-heart
• heart-whole
• heartache
• heartbeat
• heartbreak
• heartbreaker
• heartbreaking
• heartbroken
• heartburn
• heartburning
• hearted
• hearten
• heartening