1. Hollow: full of caverns.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• caverous,
• ravernous,
• xavernous,
• vavernous,
• favernous,
• davernous,
• czvernous,
• csvernous,
• cwvernous,
• cqvernous,
• cacernous,
• cabernous,
• cagernous,
• cavernolus,
• cavernus,
• cernous,
• atermous,
• cavernded,
• Cavarnulous,
• cavermoma

• cavern,
• cave-ins,
• cape horn,
• ravenous,
• cavern out.

The adjective form of "cavernous" is "cavernous".

The plural form of the word "cavernous" is "cavernous." It remains the same in both singular and plural forms.

The singular form of the word "cavernous" is "cavern"