Redeliver, meaning to deliver again or resend, can be substituted with several synonyms. One alternative is "retransmit," which is commonly used in the context of broadcasting or telecommunications. Another option is "reship," which is often used in the shipping and logistics industry. "Reissue" and "rerun" are also great alternatives when referring to repeated occurrences of something. "Reproduce," on the other hand, can be used in the context of duplicating or making a copy of something that has already been delivered. Overall, having a range of synonyms for "redeliver" can help add variety to your writing and improve clarity of communication in various contexts.