horse riding
Equestrianism .
Well yes and no. Anything to do with horses can be considered Equestrianism, but many people consider racing different from 'regular' horse sports.
Communal activities refer to group activities. So any activity done in or as part of a group of people can be considered communal activities.
Business activities refer to economic activities such as promoting, investing buying and purchasing of an organization or a company.
Please specify which equestrian event you're asking about. They all have different rules.
Abstract nouns are the words for personal qualities or general activities; some examples:arrogancebraverycharmhonestyignorancesincerityactingrunningswimmingdancinggamesport
Salamander
The global enterprises refer to the business establishments that have major international activities.
skydiving
prayer.
Intra activity refers to activities within businesses. Intra activity can also refer to activities within a particular department in businesses.