Enter a clue or pattern or both:
The Clue
Vast and hollow (9 letter answer)
The Answer
CAVERNOUS
Tags
Notes
The answer CAVERNOUS is so rare that it appears less than once every 2500 puzzles.
Definition
CAVERNOUS as an adjective:
1. being or suggesting a cavern; "vast cavernous chambers hollowed out of limestone"
2. (erectile, cavernous) = filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood; "erectile tissue"; "the penis is an erectile organ"