Acid-fast and Run-resistant

Acid-fast adjective - Not easily decolorized by acid solutions; pertains to micro-organisms (especially the tubercle bacillus that causes tuberculosis).

Run-resistant and acid-fast are semantically related. In some cases you can use "Run-resistant" instead an adjective phrase "Acid-fast".

Run-resistant adjective - (of hosiery) resistant to runs or (in Britain) ladders.

Acid-fast and run-resistant are semantically related. You can use "Acid-fast" instead an adjective phrase "Run-resistant".