Irregular and Noninterchangeable

Irregular adjective - Departing from some accepted standard of what is normal.

Noninterchangeable and irregular are semantically related. In some cases you can use "Noninterchangeable" instead an adjective "Irregular".

Nearby Words: irregularity, irregularly

Noninterchangeable adjective - Such that the terms of an expression cannot be interchanged without changing the meaning.

Irregular and noninterchangeable are semantically related. You can use "Irregular" instead an adjective "Noninterchangeable".