A large structure for open-air sports or entertainments WordNet 3.0 & Open English WordNet

A stadium is a place or venue for outdoor sports, concerts, or other events and consists of a field or stage either partly or completely surrounded by a tiered structure designed to allow spectators to stand or sit and view the event. Wikipedia

An arena is a large enclosed platform, often circular or oval-shaped, designed to showcase theatre, musical performances, or sporting events. Wikipedia

Large venue for hosting and viewing sports, concerts, and other events. Wikipedia Disambiguation

Enclosed area that showcases theatre, musical performances or sporting events. Wikipedia Disambiguation

Enclosed area designed to host theater, musical performances and sporting events Wikidata

Place or venue for outdoor sports, concerts, or other events Wikidata

arena covered by roof and walls Wikidata

A large structure for open-air sports or entertainments. OmegaWiki

An enclosed area, often outdoor, for the presentation of sporting events (sports arena) or other spectacular events; earthen area, often oval, specifically for rodeos (North America) or circular area for bullfights (especially Hispanic America). Wiktionary

An enclosed area, often outdoor. Wiktionary (translation)

An elliptical-shaped stadium or amphitheater resembling a bowl. Wiktionary

Elliptical-shaped stadium or amphitheater. Wiktionary (translation)

A venue where sporting events are held. Wiktionary

Venue where sporting events are held. Wiktionary (translation)