The part or side below or under.
A base is one of the squares to which a baseball player must run after the player, or a teammate, hits the ball.
The usually underground portion of a plant that lacks buds, leaves, or nodes and serves as support, draws minerals and water from the surrounding soil, and sometimes stores food.
The lowest or least favorable position:
The definition of foundation is the skin colored makeup used as a base on the face before other makeup is applied.
The lower front part of the human body between the chest and thighs; abdomen
The definition of a soffit is the underside of a piece of architecture.
The bottom surface of the head of a golf club.
Something in addition; excess; surplus
Find another word for underside. In this page you can discover 23 synonyms, antonyms, idiomatic expressions, and related words for underside, like: underneath, base, root, bottom, foundation, belly, soffit, sole, undersurface, over and upper-side.