Term: linesman: official (in tennis, soccer, football, etc.) who assists the referee in some way (especially by watching for out of bounds or offside)
Broader: official: someone who administers the rules of a game or sport | Unrelated: travel agent: someone who sells or arranges trips or tours for customers
Broader: official: someone who administers the rules of a game or sport | Unrelated: campstool: a folding stool
Broader: official: someone who administers the rules of a game or sport | Unrelated: bar: a submerged (or partly submerged) ridge in a river or along a shore
Broader: official: someone who administers the rules of a game or sport | Unrelated: car: where passengers ride up and down
Broader: official: someone who administers the rules of a game or sport | Unrelated: menura: type and sole genus of the family Menuridae
Broader: official: someone who administers the rules of a game or sport | Unrelated: mutillidae: a family of wasps
Broader: official: someone who administers the rules of a game or sport | Unrelated: trade policy: a government's policy controlling foreign trade
Broader: official: someone who administers the rules of a game or sport | Unrelated: epiphenomenon: a secondary phenomenon that is a by-product of another phenomenon
Broader: official: someone who administers the rules of a game or sport | Unrelated: layette: kit consisting of a complete outfit (clothing and accessories) for a new baby
Broader: official: someone who administers the rules of a game or sport | Unrelated: bullhead: any of several common freshwater catfishes of the United States