Rubella and Red rot

Rubella noun - A contagious viral disease that is a milder form of measles lasting three or four days; can be damaging to a fetus during the first trimester.

Red rot and rubella are semantically related. In some cases you can use "Red rot" instead a noun "Rubella".

Rubella and red rot are semantically related. You can use "Rubella" instead a noun phrase "Red rot".