Upender

Part of speech: noun

Definitions

1. A device or person that overturns or tips something onto its side or back ; a competitor who unexpectedly defeats or surpasses a favored opponent ; an action that reverses or significantly changes the usual order or position
2. An instrument or individual causing an object to tip over or invert ; one who achieves an unexpected victory against a higher-ranked adversary ; an event or act that disrupts the normal arrangement or hierarchy
3. Something used to flip or capsize an item ; a participant who surprises by defeating an anticipated winner ; a process that alters the standard state or arrangement by turning it upside down

Etymology: "Upender" is a plain formation: the verb "upend," meaning to turn something over or stand it on its end, with the agentive suffix "-er" added to name a thing that performs that action. The word therefore reads literally as something that upends. The verb itself is built from "up" and "end," so the sense of turning something so that its end points upward or its underside faces the sky is already built into it. Adding "-er" to a verb to name a tool or device is a common English pattern, as in "opener" or "cutter," and "upender" follows the same route.

Synonyms: toppler, tumbler, overturner