For the phrase "complimentary passes," there are several synonyms that can be used depending on the context. Some alternatives include "free tickets," "VIP admission," "guest passes," "comp tickets," "complimentary tickets," "admission vouchers," and "access passes." These terms can be applied to various situations such as concerts, events, museums, amusement parks, and more. Using different synonyms can help provide some variety to your language while still conveying the same meaning and intent. It's always good practice to mix things up and not rely too heavily on one particular phrase or term.