Problem and Refractory

Problem noun - Something that requires thought and skill for resolution.

Refractory and problem are semantically related. in difficult topic. In some cases you can use "Refractory" instead an adjective "Problem", when it comes to topics like troublesome.

Nearby Words: problematic, problematical

Refractory adjective - Given to resisting authority or another's control.

Problem and refractory are semantically related. Sometimes you can use "Problem" instead an adjective "Refractory".

Nearby Words: refractoriness, refraction, refractive, refracting, refractional