Simplify the following text for a Grade 12 native English-speaking person.
Original: In some middle-eastern countries , Marjoram is synonymous with Oregano , and there the names Sweet Marjoram and Knotted Marjoram are used to distinguish it from other plants of the genus Origanum .
Simplified: In some middle-eastern countries , Marjoram is synonymous with Oregano , and there the names Sweet Marjoram and Knotted Marjoram are used to distinguish it from other plants .