Resplendency :: Resplendency (n.) The quality or state of being resplendent; brilliant luster; vivid brightness; splendor.
Resplendent :: Resplendent (a.) Shining with brilliant luster; very bright.
Splendent :: Splendent (a.) Shining; glossy; beaming with light; lustrous; as, splendent planets; splendent metals. See the Note under 3d Luster, 4..