The standard collective noun for a group that hunts criminals is a posse of police.The standard collective noun for a group of horsemen is a cavalcade of horsemen.
The collective nouns are a cavalcade of horsemen and a troop of horsemen.
The noun 'group' is a standard collective noun for a group of guinea pigs. A collective noun is an informal part of language and the noun 'group' can be used for any suitable group.
There is no standard collective noun for a group of hikers, however, a collective noun is an informal part of language. Any noun that is suitable can function as a collective noun, such as a group of hikers.
There is no specific collective noun for a group of families, in which case a collective noun suitable for the situation is used; for example a group of family members, a reunion of families, a gathering of families, etc.
There is no standard collective noun for a group of eccentrics, in which case a noun suitable for the situation can be used; for example, a group of eccentrics, a gathering of eccentrics, an enclave of eccentrics, etc.
There is no specific collective noun for graduates, in which cas a noun suitable for the context is used; for example a throng of graduates, an assembly of graduates, a group of graduates, etc.
There is no specific collective noun for nautiluses (or nautili, both plural forms are accepted), in which case a noun suitable for the situation is used, such as a pair of nautiluses or a group of nautiluses.
team
There is no specific collective noun for the noun 'leaders', in which case a noun suitable for the situation is used; for example a group of leaders, a conference of leaders, a series of leaders, etc.
There is no standard collective noun for a group of pedigrees, in which case a noun suitable for the situation is used; for example a list of pedigrees, a book of pedigrees, etc.
There is no specific collective noun for a group of TV personalities, in which case a noun suitable for the situation is used; for example a panel of television personalities, a cast of television personalities, a company of television personalities, etc.