A nucleoside consists of a nitrogenous base and a sugar, while a nucleotide contains a nitrogenous base, sugar and a phosphate group. A deoxy nucleoside is a nucleoside without a 2' OH I believe. Hope that helps!
A nucleotide is a competitor in the WWE, while a nucleoside is a competitor in both the WWE and UFC (think of Brock Lesnar). A deoxy nucleoside is a nucleoside (current WWE competitor) that used to formerly compete in the UFC (think Ronda Rousey).