What are two terms that mean the same as posterior and anterior

Posterior means same as "back" or "situated behind".

Anterior means same as "front side".

Explanation:

Posterior comes from Latin word posterus meaning 'coming after'. It is mostly used as a technical term in Biology ad Medicine which refers to the back side of the things. We can also refer Posterior as situated at the back or towards the rear of human body. Anterior is the antonym of the posterior which means 'in the front side'. It is often used as technical term in biology and medicine. Which refers to the front side of human body. Both Interior and Posterior are used to determine the location of a body parts.