17 possible answers to
Answers with 3 characters: TIE WED Answers with 4 characters: ALLY FUSE JOIN KNIT MELD WELD Answers with 5 characters: MARRY MERGE Answers with 6 characters: CEMENT SPLICE Answers with 7 characters: CONJOIN Answers with 8 characters: COAGMENT COALESCE FEDERATE Answers with 10 characters: JOINFORCES