• fillls,
• feidls,
• firls,
• faills,
• frields,
• drils,
• frial,
• brills,
• fallls,
• driils,
• frils,
• frales,
• faklls,
• raills,
• krills,
• riolls,
• fimls,
• frull,
• frelly,
• furfills

• falls,
• fails,
• fells,
• rolls,
• fills,
• grills,
• fries,
• files,
• frolic,
• freels,
• trills.

The adjective form of the word "frills" is "frilly".

The plural of the "frills" can be the "frills".

The singular of the "frills" can be the "frill".