corona B2

/kəˈɹoʊ.nə/ The glowing outer layer of the Sun or another star, best seen during a total solar eclipse.

coronation C2+

/ˌkɔrəˈneɪʃən/ the ceremony of crowning a sovereign

coronet C2+

/ˈkɔrəˌnɛt/ a small crown worn by nobility below the rank of sovereign