"Sea sled" can be described using various synonyms, providing different impressions and contexts for the same phrase. A "wave rider" or a "surfboard" can imply a more recreational use of the sea sled. Alternatively, calling it a "watercraft" or "vessel" suggests a more serious or utilitarian purpose. Describing it as a "jet ski" or "paddle boat" provides further clarity on its appearance and function. For a more poetic and descriptive approach, one could use "ocean glider" or "marine sleigh" to evoke imagery and imagination. Overall, synonyms for "sea sled" can be chosen depending on the tone and purpose of the writing or conversation.