What nouns can only be plural?

Nouns that can only be plural are called pluralia tantum. These are words that don't have a singular form and are always used in the plural.

Here are some examples:

People and groups:

* pants

* scissors

* jeans

* trousers

* tweezers

* binoculars

* glasses (eyeglasses)

* shorts

* pliers

* scales (for weighing)

* congratulations

* savings

* wages

* goods

* belongings

* remains

* police

* cattle

* people

Other:

* tidings

* victuals

* innards

* nuptials

* archives

* thanks

* earnings

* assets

* liabilities

Note: Some words can be both singular and plural depending on context, like "series" (a series of events) or "species" (a species of animal).

It's important to remember that the usage of pluralia tantum can vary across different dialects and contexts, so always consult a dictionary or grammar guide if you're unsure about the appropriate form.