improper vs indecent

improper and indecent both are adjectives.

Word	Noun	Adjective	Verb	Adverb
improper	No	Yes	No	No
indecent	No	Yes	No	No

improper (adjective)	indecent (adjective)
not suitable or right or appropriate	offensive to good taste especially in sexual matters
not appropriate for a purpose or occasion	offending against sexual mores in conduct or appearance
not conforming to legality, moral law, or social convention	not in keeping with accepted standards of what is right or proper in polite society