VectorColorFunctionScaling is an option for graphics functions which specifies whether arguments supplied to a vector color function should be scaled to lie between 0 and 1.

VerifyConvergence is an option to Sum, NSum, and similar functions that specifies whether convergence checking should be done.

VertexComponent[g, {v_1, v_2, ...}] gives the vertices in the graph g that have a path to at least one of v_1, v_2, ....VertexComponent[g, {v_1, v_2, ...}, k] gives the ...

VertexWeight is an option and property for Graph and related functions that specifies a vertex weight.

ViewRange is an option for Graphics3D and related functions which specifies the range of distances from the view point to be included in displaying a three-dimensional scene.

Visible is a notebook option which specifies whether the notebook should be explicitly displayed on the screen.

WindowElements is a notebook option that specifies the elements to include in the window used to display the notebook on the screen.

WindowFrame is a notebook option that specifies the type of frame to draw around the window in which the notebook is displayed on the screen.

WordCharacter represents a letter or digit character in StringExpression.

WordSeparators is an option for Read, Find, and related functions that specifies the list of strings to be taken as delimiters for words.