ramp

North American perennial having a slender bulb and whitish flowers.

An inclined surface connecting two levels.

A movable staircase that passengers use to board or leave an aircraft.

Behave violently, as if in state of a great anger.

Be rampant.

“the lion is rampant in this heraldic depiction”

Creep up -- used especially of plants.

“The roses ramped over the wall”

Furnish with a ramp.

“The ramped auditorium”

Stand with arms or forelegs raised, as if menacing.