Wheelchair rugby is a team sport for athletes with a disability. Developed in Canada in the late 1970s, it is currently practiced in over twenty countries around the world and is a Paralympic sport.

The sport's original name was murderball; in the United States, it is referred to as quad rugby. All wheelchair rugby players are quadriplegic, as the rules require that they must have a disability that affects all or a portion of both the upper and lower extremities. Wheelchair rugby is a mixed sport, with men and women competing on the same teams.

Wheelchair rugby is played indoors on a hardwood court.

The rules include elements of wheelchair basketball, ice hockey, and handball. It is a contact sport and physical contact between wheelchairs is an integral part of the game.

The sport of wheelchair rugby is governed by the International Wheelchair Rugby Federation which was established in 1993.

Rugby sevens is a variant of rugby union in which only seven players per side feature, instead of the full 15. The version of rugby union is very popular, with notable competitions including the IRB Sevens World Series and the Rugby World Cup Sevens. Rugby sevens is also played at events such as the Commonwealth Games. Although it was conceived as an event for rugby union, rugby league has also adopted the sevens format.

Rugby league football is a competitive full-contact team sport played with a prolate spheroid-shaped ball by two teams of thirteen on a rectangular grass field. Rugby league is one of the two major codes of rugby football, the other being rugby union. The league code is most prominent in Great Britain, Australia, New Zealand, and France, where the sport is played professionally. Rugby league is also popular in Papua New Guinea where it is considered the national sport. The game is played to a lesser extent in several other countries, such as Russia, the United States and Lebanon.

Rugby league takes its name from what was initially a breakaway faction of the English Rugby Football Union (RFU) known as the Northern Rugby Football Union when established in 1895. Both organisations played the game under similar rules at first, until similar breakaway factions occurred from RFU-affiliated rugby football unions in Australia and New Zealand in 1907 and 1908, and formed associations known as rugby football leagues, introducing modified Northern Union rules to create a new form of rugby football. The Northern Union later changed its name to the Northern Rugby Football League in 1922 (later dropping the 'Northern') and thus, over time the sport itself became known as "rugby league". Over the following decades, the rules of both forms of rugby were gradually changed, and now rugby league and rugby union are distinctly different sports.

Rugby union is a competitive outdoor contact sport, played with an oval Laws Of The Game Rugby Union 2007. International Rugby Board. ISBN-10: 0-9552232-4-5 ISBN-13: 978-0-9552232-4-2. Page 7. Quote "Law 2 The Ball: 2.1 SHAPE: The ball must be oval and made of four panels." ball, by two teams of 15 players. It is one of the two main codes of rugby football, the other being rugby league. There is also a seven-a-side variant named rugby sevens, which is played under modified laws and with only seven players per team. Another variant popular in parts of New Zealand is South Island Round-ball rugby (or just round-ball rugby or "rumble" rugby).

Rugby union is most often referred to as simply rugby. It has also been known by the name rugger, although that term has declined in use.More colloquial terms for rugby union include rugger or egg chasing.Rugger:

*OED:Rugger "Slang or colloquial alteration of RUGBY (in the sense of 'Rugby football'). Freq. attrib. rugger-tackle".

*Tony Collins, Football, rugby, rugger?, BBC sound recording with written transcript, and a comment in prose by Jonnie Robinson, Curator, English accents and dialects, British Library Sound Archive.)