Numerical digit refers to any of the symbols used to represent numbers. There are a number of synonyms for the term numerical digit, including numeral, digit, figure, character, symbol, and integer. Each of these synonyms describes a specific aspect of the numerical value being represented, and can be used interchangeably in different contexts. For example, a numeral may refer to a specific number, while a digit refers to any of the symbols used to represent numbers. Similarly, a figure may refer to a specific numerical value, while a character or symbol may refer to any of the symbols used to represent numbers in a given context. Ultimately, the choice of synonym will depend on the specific context and intended meaning of the term.