Noun
たま
先日、銃の弾のようなかたちの便が出た。
My poop was shaped like a bullet for a gun the other day.
The kanji and the word are exactly the same. That means they share meanings as well.
Remember 球? This is also a bullet shape (remember how bullets used to be round spheres?). These are both similar ideas, though their intent is different, and they share the same reading.