There are a number of synonyms for "slivery" that convey the same or similar meanings. Some of these include "vermicular," which describes something that is long, thin, and sinuous, like a worm; "filiform," which suggests a structure that is thread-like; "whisker-like," connoting something that is slender and sensitive, like a cat's whiskers; and "splintered," suggesting something that has been broken into thin, jagged pieces. Other synonyms for "slivery" might include "needle-like," "tapering," "thin," "sharp," "narrow," "pointed," "sparse," and "bony." Ultimately, the best synonym for "slivery" will depend on the specific context in which the word is being used.