ramp

North American perennial having a slender bulb and whitish flowers

behave violently, as if in state of a great anger

an inclined surface connecting two levels

a movable staircase that passengers use to board or leave an aircraft

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