Buck
Part of speech: verb
Definition: (of a horse, or similar saddle or pack animal) To leap upward arching its back, coming down with head low and forelegs stiff, forcefully kicking its hind legs upward, often in an attempt to dislodge or throw a rider or pack. (of a horse, or similar saddle or pack animal) to successfully throw or attempt to throw (a rider or pack) by bucking. (by extension) To resist obstinately; oppose or object strongly. (by extension) To move or operate in a sharp, jerking, or uneven manner. (by extension) To overcome or shed (e.g., an impediment or expectation), in pursuit of a goal; to force a way through despite (an obstacle); to resist or proceed against. To press a reinforcing device (bucking bar) against (the force of a rivet) in order to absorb vibration and increase expansion. See Wikipedia: Rivet:Installation.
Part of speech: noun
Definition: A male deer, antelope, sheep, goat, rabbit, hare, and sometimes the male of other animals such as the ferret and shad. An uncastrated sheep, a ram. A young buck; an adventurous, impetuous, dashing, or high-spirited young man. A fop or dandy. A black or Native American man. A dollar (one hundred cents). One hundred. An object of various types, placed on a table to indicate turn or status; such as a brass object, placed in rotation on a US Navy wardroom dining table to indicate which officer is to be served first, or an item passed around a poker table indicating the dealer or placed in the pot to remind the winner of some privilege or obligation when his or her turn to deal next comes. Blame; responsibility; scapegoating; finger-pointing. (always plural, bucks) Casual oxford shoes made of buckskin, often white or a neutral color. The body of a post mill, particularly in East Anglia. See Wikipedia:Windmill machinery. One million dollars.
Example sentence: I have always been driven to buck the system, to innovate, to take things beyond where they've been.
Horse
Part of speech: verb
Definition: To provide with a horse.To frolic, to act mischieviously. Usually followed by "around".
Part of speech: noun
Definition: A hoofed mammal (scientific name Equus caballus).Any current or extinct animal of the family Equidae, including the zebra or the ass.Cavalry soldiers (often capitalized).In gymnastics, a piece of equipment with a body on two or four legs, approximately four feet high with two handles on top.The chess piece representing a knight, depicted as a man in a suit of armor and often one a horse, hence the nickname.A large person.A rope stretching along a yard, upon which men stand when reefing or furling the sails; foot ropes.Heroin.
Example sentence: Being born in a stable does not make one a horse.