"Wispish" is an adjective often used to describe someone or something that is delicate, ethereal, or insubstantial. Synonymous terms for this word include "airy", suggesting a light and gentle quality, or "diaphanous", indicating a transparent and delicate nature. Additional alternatives for "wispish" could be "ethereal", emphasizing a mystical and delicate presence, or "filmy", evoking a thin and delicate texture. Moreover, synonyms like "fleeting" or "evanescent" depict something that is transient or fleeting, similar to a wisp. Ultimately, these synonyms provide a repertoire of words to effectively convey the essence of "wispish" while adding variety and nuance to one's writing.