Synonyms for Baritone (same or very similar meaning)
WordNet sense 1 (a male singer):
barytoneWordNet sense 2 (the second lowest adult male singing voice):
baritone voiceWordNet sense 3 (the second lowest brass wind instrument):
baritone hornWordNet sense 4 (used of sounds and voices; low in pitch or frequency):
low, low-pitchedFrom the ODE community, based on WordNetadd/edit