Enter a clue or pattern or both:
The Clue
Like some machine parts (15 letter answer)
The Answer
INTERCHANGEABLE
Tags
Notes
The answer INTERCHANGEABLE is so rare that it appears less than once every 2500 puzzles.
Definition
INTERCHANGEABLE as an adjective:
1. (mathematics, logic) such that the arguments or roles can be interchanged; "the arguments of the symmetric relation, `is a sister of,' are interchangeable"
2. (exchangeable, interchangeable, similar, standardized, standardised) = capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability; "interchangeable electric outlets" "interchangeable parts"