The Collaborative International Dictionary of English v.0.48:

Nasalize \Na"sal*ize\, v. t. [imp. & p. p. Nasalized; p. pr. &
   vb. n. Nasalizing.]
   To render nasal, as sound; to insert a nasal or sound in.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

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