Acid-fast and Mothproof

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

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

Mothproof adjective - Resistant to damage by moths.

Acid-fast and mothproof are semantically related. You can use "Acid-fast" instead an adjective "Mothproof".