Word
共通の；普通の、よくある；公共の
Occurring, found, or done often; belonging to or shared by two or more people or things.
It's common for children to be afraid of the dark.
子供が暗闇を怖がるのはよくあることです。
`have something in common`「共通点がある」は非常に良く使われる表現。