What’s the other name of buoyant force?

Hint: As the other name of buoyant force is less than the weight of the object, the object will sink. If it is larger than the weight of the object, the object will float. It's when the pressure on the bottom of an object submerged in a liquid is greater than the pressure on the top.

Complete answer:
Upthrust is the other name of buoyant force. The upward force exerted by a fluid against the weight of an immersed item is known as buoyancy or upthrust. It is the force that causes an item to rise in the air. The buoyancy, or upthrust, keeps ships afloat. The upthrust, often known as buoyancy, keeps swimmers afloat.

Or, in other words, when an object is partially or completely submerged, the pressure on its bottom surface is greater than on its top surface. As a result, a force is exerted upwards. Upthrust is the term for this force. The weight of the fluid displaced by the item equals the upthrust force.

When a body is submerged in a fluid, it has the tendency to float or rise, which is used to determine its buoyancy. The ability of a fluid to exert an upward force on a body submerged in it; also, the upward force exerted by water.

Note: The buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, $g$, in simple terms. Upthrust is another term for this.