The word "nef" is quite rare, and it is difficult to find suitable synonyms that share the exact same meaning. However, terms such as "a small boat" or "a small vessel" could be used as an alternative for "nef." Additionally, depending on the context of usage, terms such as "dinghy," "canoe," or "raft" could also be suitable choices for synonyms for "nef." These terms, even though they may not be an exact match for "nef," can be used to convey a similar meaning, specifically a small or tiny mode of transportation used on the water.