[1] : WordNet (r) 2.0

tonal
     adj 1: employing variations in pitch to distinguish meanings of
            otherwise similar words; "chinese is a tonal language"
            syn: tonic
     2: having tonality; i.e. tones and chords organized in relation
        to one tone such as a keynote or tonic ant: atonal
see also:
tonic atonal 

[2] : Moby Thesaurus II by Grady Ward, 1.0

98 moby thesaurus words for "tonal":
   accented, alveolar, apical, apico-alveolar, apico-dental,
   articulated, assimilated, back, barytone, bilabial, broad,
   cacuminal, central, cerebral, checked, chromatic, close, consonant,
   consonantal, continuant, dental, dissimilated, dorsal, droning,
   enharmonic, flat, front, glide, glossal, glottal, guttural, hard,
   heavy, high, intonated, labial, labiodental, labiovelar, lateral,
   lax, light, lingual, liquid, low, mid, monophthongal, monotone,
   monotonic, muted, narrow, nasal, nasalized, occlusive, open,
   oxytone, palatal, palatalized, pharyngeal, pharyngealized,
   phonemic, phonetic, phonic, pitch, pitched, posttonic, retroflex,
   rounded, semitonic, semivowel, soft, sonant, soniferous, sonorous,
   sounded, sounding, stopped, stressed, strong, surd, syllabic,
   tense, thick, throaty, toneless, tonic, twangy, unaccented,
   unrounded, unstressed, velar, vocalic, vocoid, voiced, voiceless,
   vowel, vowellike, weak, wide

Tonal >> T Words
Tonal, definition of term: Tonal
tonal_pag1.html