NotTildeFullEqual[x, y, ...] displays as x \[NotTildeFullEqual] y \[NotTildeFullEqual] ....
NotTilde[x, y, ...] displays as x \[NotTilde] y \[NotTilde] ....
NotTildeTilde[x, y, ...] displays as x \[NotTildeTilde] y \[NotTildeTilde] ....
NotVerticalBar[x, y, ...] displays as x \[NotVerticalBar] y \[NotVerticalBar] ....
Proportional[x, y, ...] displays as x \[Proportional] y \[Proportional] ....
ReverseElement[x, y, ...] displays as x \[ReverseElement] y \[ReverseElement] ....
SmallCircle[x, y, ...] displays as x\[SmallCircle]y\[SmallCircle]....
Star
(Built-in Mathematica Symbol) Star[x, y, ...] displays as x\[Star]y\[Star]....
TildeEqual[x, y, ...] displays as x \[TildeEqual] y \[TildeEqual] ....
TildeFullEqual[x, y, ...] displays as x \[TildeFullEqual] y \[TildeFullEqual] ....