The noun jade can be countable or uncountable. In more general, commonly used, contexts, the plural form will also be jade. However, in more specific contexts, the plural form can also be jades e.g. in reference to various types of jades or a collection of jades.

Is jade a swear word?

It was first used in Middle English to mean “a broken-down horse.” Later the word for a worthless horse was often applied to a woman (or, very rarely, to a man) considered worthless. Now a jade is more often a disreputable woman than a broken-down horse.

Is jade a proper noun?

Proper noun A female given name from the noun jade, popular in the 2000s.