mantelpiece

As a noun mantelpiece

is a shelf that is affixed to the wall above a fireplace.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between fire and mantelpiece

is that fire is the sector of the economy including finance, insurance and real estate businesses while mantelpiece is a shelf that is affixed to the wall above a fireplace.

As nouns the difference between chimney and mantelpiece

is that chimney is a vertical tube or hollow column used to emit environmentally polluting gaseous and solid matter (including but not limited to by-products of burning carbon or hydro-carbon based fuels); a flue while mantelpiece is a shelf that is affixed to the wall above a fireplace.

As a verb chimney

is (climbing) to negotiate a chimney (sense #4) by pushing against the sides with back, feet, hands, etc.

As nouns the difference between mantelpiece and fireguard

is that mantelpiece is a shelf that is affixed to the wall above a fireplace while fireguard is a mesh screen around a fire to prevent sparks or falling embers.

As nouns the difference between mantelpiece and mantelpiece

is that mantelpiece is a shelf that is affixed to the wall above a fireplace while mantelpiece is a shelf that is affixed to the wall above a fireplace.

As a noun mantelpiece is

a shelf that is affixed to the wall above a fireplace.

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.

Ledge is a synonym of mantelpiece.

As nouns the difference between ledge and mantelpiece

is that ledge is a shelf on which articles may be laid; also, that which resembles such a shelf in form or use, as a projecting ridge or part, or a molding or edge in joinery while mantelpiece is a shelf that is affixed to the wall above a fireplace.

As nouns the difference between taxonomy and mantelpiece

is that taxonomy is the science or the technique used to make a classification while mantelpiece is a shelf that is affixed to the wall above a fireplace.