小山 is read as こやま (koyama) and means hill.
こやま
koyama
やまごや
mountain hut (esp. one that offers lodging to climbers and hikers)
こども
child
こあめ
light rain
しょうがくせい
elementary school student
しょうがっこう
primary school
おがわ
stream
ぼや
small fire
ちいさい
low (e.g. sound)
こうなご
young lancefish
こばなし
anecdote
しょうがく
school for children over eight years old in ancient China
しょうこく
small country