Unmentionable is a related term of shameful.
As adjectives the difference between unmentionable and shameful
is that unmentionable is not mentionable while shameful is causing or meriting shame or disgrace; disgraceful.
unmentionable
English
Derived terms
* unmentionables
* unmentionably
shameful
English
Adjective
(
en adjective)
causing or meriting shame or disgrace; disgraceful
giving offense
Derived terms
* shamefully
* shamefulness