Crabs and Gonorrhea

Crabs noun - Infestation of the pubic hair by crab lice.

Gonorrhea and crabs are semantically related In some cases you can use "Gonorrhea" instead a noun "Crabs".

Gonorrhea noun - A common venereal disease caused by the bacterium Neisseria gonorrhoeae; symptoms are painful urination and pain around the urethra.

Crabs and gonorrhea are semantically related in disease given through sexual relations topic. You can use "Crabs" instead a noun "Gonorrhea", if it concerns topics such as disease communicable through sex.