Synonyms of the word 
TUNELESS → UNMELODIOUS - UNTUNEFUL
tuneless
- adj. Having no pleasing tune; not tuneful.
- adj. Silent or mute.
unmelodious
- adj. Not melodious.
untuneful
- adj. Not tuneful; unmusical, inharmonious.
If you are interested in words, visit the following sites :
- wiktionary.org/tuneless For complete definition of a word
- 1word.ws/tuneless to play with words, suffixs, prefixs, etc.