Morning sickness and Motion sickness

Morning sickness noun - Nausea early in the day; a characteristic symptom in the early months of pregnancy.

Motion sickness and morning sickness are semantically related. In some cases you can use "Motion sickness" instead a noun phrase "Morning sickness".

Motion sickness noun - The state of being dizzy or nauseated because of the motions that occur while traveling in or on a moving vehicle.

Morning sickness and motion sickness are semantically related. You can use "Morning sickness" instead a noun phrase "Motion sickness".