There's an incorrect spelling of "thimble" that sometimes pops up: "thible". The word "thimble" is pronounced /ˈθɪmbəl/ - with a voiced "th" sound and the schwa vowel in the second syllable. The incorrect spelling "thible" might indicate that some people associate the "th" sound with the spelling "thib" (as in "thick") rather than "thim" (as in "thimble"). Nevertheless, it's important to use correct spellings to avoid confusion and make sure communication is clear.