/z/ Sound Spelled ZZ Word List
The /z/ sound has six common spellings, se, s, ss, z, zz, and ze. The zz spelling follows single vowel letters because the purpose of doubled consonants is to mark the preceding vowel letter as the First Vowel Sound of those letters.
Of the 7,000 words in the database constructed from a popular children’s dictionary, 14 of them are words with the /z/ sound spelled "zz".
Note on the word divisions: Each word is divided into chunks determined by the unique and highly effective OnTrack Reading Multisyllable Method. The chunks are not syllables.