radiator (suomeksi)

säteilijä (s: anything which radiates or emits rays / type of antenna)
lämpöpatteri (s: finned metal fixture that carries hot water or steam in order to heat a room)
jäähdytin (s: k=fi / yhteys / device that lowers engine coolant temperature by conducting heat to the air)
radiaattori (s: anything which radiates or emits rays)
säteilylähde (s: anything which radiates or emits rays)