It can be a substitue for "is," or it can be a possessive suffix.
Substitute.
surrogate or stand-in
Substitute or exchange can be used instead of replace.
The ampersand (&) is a logogram used as a substitute for the word and.
The noun 'substitute' is a singular, common noun; a word for someone or something that takes the place of another.The noun 'substitute' is a concrete noun when used for a physical person or thing.example: Soy milk is a good substitute for dairy milk in recipes.The noun 'substitute' is an abstract noun when used for a concept.example: Excuses are no substitute for doing the right thing.The word 'substitute' is also a verb (substitute, substitutes, substituting, substituted).The noun form of the verb to substitute is the gerund, substituting.A related noun form is substitution.
Whoha is a word used as a substitute for any other word you do not wish to speak.
Nylon was invented in the 1930's by DuPont as a silk substitute.
Melancholy would be a good substitute.
The word "flounder" can be used as a substitute for struggling helplessly.
Yes, not only CAN it be, that is exactly what it is fore.
The terms used could be disengaged, or neutral.
Substitute/Sub or Interchange