o·ver·ac·tive 
(ō′vər-ăktĭv)
(ō′vər-ăktĭv)adj.
Active to an excessive or abnormal degree: an overactive pituitary gland; an overactive imagination.
o′ver·ac·tivi·ty n.
- semiabstraction
- semiannual
- semiannually
- semiaquatic
- Semi-Arian
- Semi-Arianism
- semiarid
- semiaridity
- semiattached
- semiauto
- semi-auto
- semiautobiographical
- semiautomated
- semiautomatic
- semi-automatic
- semiautonomous
- semiautonomously
- semiautonomy
- semibold
- semibreve
- semicentennial
- semicircle
- semicircular
- semicircular canal
- semicivilized