Cervical cap and Morning-after pill

Cervical cap noun - A contraceptive device consisting of a small thimble-shaped cup that is placed over the uterine cervix to prevent the entrance of spermatozoa.

Morning-after pill and cervical cap are semantically related. In some cases you can use "Morning-after pill" instead a noun phrase "Cervical cap".

Morning-after pill noun - A large dose of estrogen taken orally within 24 to 72 hours after intercourse; prevents implantation of a fertilized ovum and so acts as a contraceptive; commonly used after rape or incest.

Cervical cap and morning-after pill are semantically related. You can use "Cervical cap" instead a noun phrase "Morning-after pill".