Unconventional is a related term of indecorous.
As adjectives the difference between unconventional and indecorous
is that unconventional is not adhering to convention or accepted standards while indecorous is improper, immodest or indecent.
As a noun unconventional
is something or someone that is unconventional.
unconventional
English
Adjective
(
en adjective)
Not adhering to convention or accepted standards
Out of the ordinary
Atypical
Noun
(
en noun)
Something or someone that is unconventional.