Better and High-test

Better adjective - (comparative of `good') superior to another (of the same class or set or kind) in excellence or quality or desirability or suitability; more highly skilled than another.

High-test and better are semantically related. In some cases you can use "High-test" instead an adjective "Better".

Better and high-test are semantically related. You can use "Better" instead an adjective phrase "High-test".