There are several synonyms for the term 'tilting board,' some of which include the words inclined plane, ramp, slope, and slant board. An inclined plane refers to a flat surface that is tilted at an angle. A ramp is a sloping surface or incline that is used to access elevated areas like entrances and exits. A slope refers to a gradual increase or decrease in elevation over a given distance. Lastly, a slant board is a flat surface that is inclined at an angle and used for activities like writing or reading. All these terms can be used interchangeably with tilting board depending on the context in which they are used.