More general terms:
* Skirt: This is the most general option, but doesn't capture the unique characteristics of a kilt.
* Pleated garment: This highlights the distinctive pleats of a kilt.
* Tartan garment: This emphasizes the use of tartan fabric, which is common in kilts.
More specific terms:
* Highland dress: This refers to the traditional dress of the Scottish Highlands, which includes the kilt.
* Great kilt: This specifically refers to the full-length kilt, as opposed to the shorter "modern" kilt.
Other options:
* Frock: This is a less common word for a kilt, but it can be used in some contexts.
* Wraparound skirt: This accurately describes the basic structure of a kilt.
The best alternative for "kilt" will depend on the specific situation and what you want to emphasize.