Polynesia, which means "many islands", is the collective term for the countries within east-central Pacific.
Forests, is the collective term for groups of treed vegetation.
The noun 'countries' is not a collective noun.A collective noun is a noun used to group people or things in a descriptive way; for example, an alliance of countries or a coalition of countries.
The OED, tells us that the term Pacific Rim first appeared in 1926, and refers to 'the countries and regions which border the Pacific Ocean'.
Countries of the Pacific Rim The "Pacific Rim" includes the countries that lie along the Pacific Ocean. Plus, the island countries of the Pacific
Oceania
Geese is actually the collective term for goose.
Collective Term stands for a group of objects, people, or thing as a basic unit.
The collective term for a group of ferrets is a "a business of ferrets" or "a cast of ferrets".
The noun perianth is a collective term for all the petals and sepals.
the collective term for watches timers or clocks is either chronometer
The collective term for caterpillars is an army of caterpillars.
the collective term for a positive integers and zero is