Accomplice
This is usually a crime of negligence.
substitute
Possible examples are assistant, acolyte, adjutant, and aide-de-camp.
replacement
One possible substitute for "their" is "his" or "her" depending on the gender of the person/people being referred to. Another substitute can be "its" when referring to a non-human object or entity.
Yes, the word 'substitute' is a noun, a singular, common, abstract noun; a word for someone or something that takes the place of another. The word 'substitute' is also a verb (substitute, substitutes, substituting, substituted). Examples:Noun: Salsa is a good substitute for tomatoes in a sandwich.Verb: Ms. Lincoln will substitute for Ms. Washington while she is on her honeymoon.
surrogate or stand-in
duplicate, copy, model, substitute
Substitute.
A felony is a major crime. A lesser crime is called a misdemeanor.
backup, temporary, another, alternative, substitute
The word "substitute" means to put in place of another, often referring to replacing someone or something with another option. The prefix "sub-" means under or as a replacement.