The English language is an incredible tool for communication, and its vast vocabulary holds a myriad of synonyms for every word imaginable. When it comes to the opposite of consonant, there are several words that come to mind. One of the most common is "vowel," which is the counterpart of consonants in the English alphabet and is used to form syllables in words. Another word that represents the opposite of consonant is "vocalic," which refers to sounds that are produced using the vocal cords, such as vowels. Finally, "unvoiced" is another word that can be used to describe the opposite of consonants, as they are sounds produced without the use of vocal cords.