UpperRightArrow[x, y, ...] displays as x \[UpperRightArrow] y \[UpperRightArrow] ....
UpTeeArrow[x, y, ...] displays as x\[UpTeeArrow]y\[UpTeeArrow]....
Vee
(Built-in Mathematica Symbol) Vee[x, y, ...] displays as x\[Vee]y\[Vee]....
VertexReplace[g, {v_1 -> w_1, v_2 -> w_2, ...}] replaces each vertex v_i in the graph g by w_i.
VerticalBar[x, y, ...] displays as x \[VerticalBar] y \[VerticalBar] ....
VerticalSeparator[x, y, ...] displays as x \[VerticalSeparator] y \[VerticalSeparator] ....
WaitNext[{eid_1, eid_2, ...}] waits until the first evaluation represented by any of the eid_i finishes, then returns its result, the corresponding eid_i, and the list of ...
Wedge
(Built-in Mathematica Symbol) Wedge[x, y, ...] displays as x\[Wedge]y\[Wedge]....
WordBoundary represents a boundary between words for purposes of matching in StringExpression.
WordSearch is an option for Find and FindList that specifies whether the text searched for must appear as a word.