A ______ is a word of a programming language that is special only in certain contexts.

Explanation

For example, In Fortran, the word Integer, when found at the beginning of a statement and followed by a name, is considered a keyword that indicates the statement is a declarative statement. However, if the word Integer is followed by the assignment operator, it is considered a variable name. These two uses are illustrated in the following

Integer Apple
Integer = 4