Make Your Editor Cry: Hovercraft (Awkward Plural)

Make Your Editor Cry: Hovercraft (Awkward Plural)

BLUF: (Bottom Line Up Front)
The plural of hovercraft is hovercraft.

hovercraft: a vehicle that is supported above the surface of land or water by a cushion of air produced by downwardly directed fans.

The singular of hovercraft is hovercraft. The plural of hovercraft is also hovercraft. The word “hovercrafts” is not a thing, or a word.

Examples:

Nothing can stop an attack by a military hovercraft except another hovercraft.
It's unbelievable what one fleet of twelve hovercraft did to tip the balance.