obscene

As a proper noun blue

is an anglicization of (etyl) blau.

As an adjective obscene is

obscene.

As adjectives the difference between obscene and obnoxious

is that obscene is obscene while obnoxious is extremely unpleasant, offensive, very annoying, odious or contemptible.

As adjectives the difference between ribald and obscene

is that ribald is coarsely, vulgarly, or lewdly amusing; referring to sexual matters in a rude or irreverent way while obscene is obscene.

As a noun ribald

is an individual who is filthy or vulgar in nature.

As adjectives the difference between obscene and sacrilegious

is that obscene is offensive to current standards of decency or morality while sacrilegious is committing sacrilege; acting or speaking very disrespectfully toward what is held to be sacred.

As adjectives the difference between sexual and obscene

is that sexual is of or relating to having sex, sexual acts and sexual reproduction while obscene is obscene.

As a noun sexual

is (biology) a species which reproduces by sexual rather than asexual reproduction, or a member of such a species.

As adjectives the difference between irreverent and obscene

is that irreverent is irreverent while obscene is obscene.

As adjectives the difference between tasteless and obscene

is that tasteless is having no flavour; bland, insipid while obscene is obscene.

As adjectives the difference between uncivil and obscene

is that uncivil is not civilized; savage; barbarous; uncivilized while obscene is obscene.

As adjectives the difference between racy and obscene

is that racy is having a strong flavor indicating origin; of distinct characteristic taste; tasting of the soil; hence, fresh; rich while obscene is offensive to current standards of decency or morality.

As adjectives the difference between inappropriate and obscene

is that inappropriate is not appropriate; not suitable for the situation, time, and/or place while obscene is obscene.