Dyke
Part of speech: noun
Definition: (usually derogatory) A lesbian, particularly one with masculine or butch traits or behavior. A toilet. a ditch. a valley. A lesbian. This word has been reclaimed, by some, as politically empowering. (See usage notes.)
Example sentence: There's Dick Van Dyke and John Ritter, the two greatest physical comics of our generation.
Dike
Part of speech: noun
Definition: The northern English form of ditch.A ditch and bank running alongside each other.A barrier of stone or earth used to hold back water and prevent flooding.A lesbian, especially a manly or unattractive lesbian.A body of once molten igneous rock that was injected into older rocks in a manner that crosses bedding planes.