Before plosive or affricate consonants this nasality becomes homorganic nasal of the following consonant. Vowel nasality is phonemic in the language. Although some vowels are strongly nasal, instances of distinctive nasality are rare. Nasal vowels do not feature uniform nasality over their duration. On occasion, nasal sonorants (particularly ) may even decay into vowel nasality. In some languages nasality and vowel harmony are considered suprasegmental or prosodic by some phonologists. The nasality of nasal vowels, however, is a distinctive feature of certain languages. No Germanic language that preserves the word-final vowels has their nasality preserved. Nasality is a suprasegmental feature of Kensiu vowels. No two words differ in both the nasality of the vowels and vowel length. As mentioned above, nasality of vowels has a contrastive distribution with many minimal pairs. Vocalizations vary in terms of accent, pronunciation, articulation, roughness, nasality, pitch, volume, and speed. Its four basic vowels are distinguished for nasality, length, and tone. Here the nasality of the vowel is separated out as a nasal consonant. The nasality spreads to an adjacent vowel if that vowel is nasalizable as well.