Sing and owning up are semantically related. in admit topic. In some cases you can use "Sing" instead a verb "Owning up", when it comes to topics like declare.
Sing verb – To produce musical sounds with the voice. Owning up and sing are semantically related. Sometimes you can use "Owning up" instead a verb "Sing". Nearby Words: singing, singer, singe, singed, singable