backsplash

As a noun backsplash

is a vertical covering on a wall rising above a countertop or other work surface to protect the wall from spills and to decorate the wall.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between splashboard and backsplash

is that splashboard is a guard towards the front of a vehicle, to prevent splashing by mud or water from the road while backsplash is a vertical covering on a wall rising above a countertop or other work surface to protect the wall from spills and to decorate the wall.

As nouns the difference between backslash and backsplash

is that backslash is the punctuation mark \ while backsplash is a vertical covering on a wall rising above a countertop or other work surface to protect the wall from spills and to decorate the wall.

As a verb backslash

is to escape (a metacharacter) by prepending a backslash that serves as an escape character, thereby forming an escape sequence.

As nouns the difference between taxonomy and backsplash

is that taxonomy is the science or the technique used to make a classification while backsplash is a vertical covering on a wall rising above a countertop or other work surface to protect the wall from spills and to decorate the wall.