consonantism
noun
con·so·nant·ism ˈkän(t)-sə-nən-ˌti-zəm 
1
: the consonant system (as of a language or dialect)
2
: the consonants, sequence of consonants, or quality peculiar to the consonants of a word or group of related words
Word History
Etymology
consonant entry 2 + -ism
First Known Use
1849, in the meaning defined at sense 1