Synonyms of the word 
UNTACTFUL → INCONSIDERATE - INELEGANT - TACTLESS
untactful
- adj. Not tactful.
inconsiderate
- adj. Not considerate of others, thoughtless.
- adj. (obsolete) inconsiderable.
inelegant
- adj. Not elegant; not exhibiting neatness, refinement, or precision.
tactless
- adj. having no tact; unaware or intentionally inconsiderate of someone else's feelings.
If you are interested in words, visit the following sites :
- wiktionary.org/untactful For complete definition of a word
- 1word.ws/untactful to play with words, suffixs, prefixs, etc.