11. Certain suffixes begin with consonant clusters or consist of single consonants, including vocalic length. 12. There are six additional vocalic diacritics in the " mi [ ra " alphabet. 13. The close central unrounded vowel is the vocalic equivalent of the rare post-palatal approximant. 14. Harmony determined whether a front vocalic or a back vocalic allomorph of a suffix was used. 15. Harmony determined whether a front vocalic or a back vocalic allomorph of a suffix was used. 16. The close central rounded vowel is the vocalic equivalent of the rare labialized post-palatal approximant. 17. Other prominent subcategories include vocalics ( paralanguage ), and proxemics ( the use of space ). 18. Though phonetically length is a vocalic feature, the phonological system treats vowel length as a consonant. 19. The main difference is that southeastern Iberian script does not redundantly mark the vocalic values of syllabic characters. 20. Some varieties ( including most American English dialects ) have significant vocalic neutralization before intervocalic, as well.