Enter a clue or pattern or both:
The Clue
Like Kilroy, once (10 letter answer)
The Answer
UBIQUITOUS
Tags
Notes
The answer UBIQUITOUS is so rare that it appears less than once every 2500 puzzles.
Related Clues
Omnipresent
Definition
UBIQUITOUS as an adjective:
1. (omnipresent, ubiquitous) = being present everywhere at once