list of synonyms of word improper

• indecent (similar term)
• indecorous (similar term)
• unbecoming (similar term)
• uncomely (similar term)
• unseemly (similar term)
• untoward (similar term)
• out-of-the-way (similar term)
• wrong (similar term)
• inappropriate (related term)
• incorrect (related term)
• wrong (related term)
• indecent (related term)
• indecorous (related term)
• indelicate (related term)
• unfit (related term)
• wrong (related term)
• proper (antonym)

• unconventional
• unlawful
• irregular (similar term)

• unsuitable
• wrong
• inappropriate (similar term)