We don't have synonyms for fricatives yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are fricative, frictive and fixatives.
(n) :
(phonetics) Any of several speech sounds produced by air flowing through a constriction in the oral cavity and typically producing a sibilant, hissing, or buzzing quality; a fricative consonant.
(adj) :
(phonetics) produced by air flowing through a restriction in the oral cavity.
(n) :
(phonetics) Any of several speech sounds produced by air flowing through a constriction in the oral cavity and typically producing a sibilant, hissing, or buzzing quality; a fricative consonant.
(adj) :
(phonetics) produced by air flowing through a restriction in the oral cavity.