Last-chance is a phrase often used to indicate the final opportunity to do something. However, there are other phrases and words that can be used to convey a similar meaning. For instance, a "final shot" refers to the last attempt to achieve something, while a "final opportunity" refers to a final occasion to do something. Another synonym for "last-chance" is "final offer" which indicates the final offer or proposal in a negotiation. "Last resort" is another synonym that implies that there is no other option available. In conclusion, there are several synonyms that can be used in place of last-chance depending on the context and the specific connotation needed.