What is the plural of swine?

The plural of swine is swine.

Swine is an invariant noun: the singular and plural are identical.

All forms of swine

as a noun

base: swine
plural: swine

Swine in a sentence

They sacrificed forbidden swine, and put to death all who refused to eat.unknown
His great oration was like pearls before swine.unknown
It is like casting pearls before swine.CM