sill

Projection is a related term of sill.

As nouns the difference between projection and sill

is that projection is something which projects, protrudes, juts out, sticks out, or stands out while sill is (architecture) (also window sill ) a horizontal slat which forms the base of a window or sill can be (uk) a young herring or sill can be the shaft or thill of a carriage.

As nouns the difference between outcropping and sill

is that outcropping is an outcrop while sill is (also window sill) A horizontal slat which forms the base of a window.

As nouns the difference between sill and mantel

is that sill is (also window sill) A horizontal slat which forms the base of a window while mantel is the shelf above a fireplace which may be also a structural support for the masonry of the chimney.

As a verb mantel is

{{cx|climbing|lang=en}} To surmount a ledge by pushing down on the ledge to bring up the body.

As a noun sill is

(architecture) (also window sill ) a horizontal slat which forms the base of a window or sill can be (uk) a young herring or sill can be the shaft or thill of a carriage.

As nouns the difference between sill and mantelpiece

is that sill is (also window sill) A horizontal slat which forms the base of a window while mantelpiece is a shelf that is affixed to the wall above a fireplace.

Sill is a related term of foothold.

As nouns the difference between sill and foothold

is that sill is (architecture) (also window sill ) a horizontal slat which forms the base of a window or sill can be (uk) a young herring or sill can be the shaft or thill of a carriage while foothold is (climbing) a solid grip with the feet.

As nouns the difference between sill and step

is that sill is (also window sill) A horizontal slat which forms the base of a window while step is an advance or movement made from one foot to the other; a pace.

As a verb step is

to move the foot in walking; to advance or recede by raising and moving one of the feet to another resting place, or by moving both feet in succession.