Antonyms for Formal

Antonyms starting with letter U

• unceremonious

  serious
• unofficial

  serious
• unconventional
• undignified
• unaffected

  established, stiff
• unliterary
• unorthodox
• unauthorized
• unapt
• unbecoming
• unfit
• unhappy
• unseemly
• unsuitable
• unmannerly
• unfashionable
• unstylish
• unkempt
• untidy
• unbookish
• uncouth
• uncultivated
• uncultured
• unpolished
• unrefined
• uneducated
• ungrammatical
• unlearned
• unceremonial
• unrhetorical