indecent vs unseemly

indecent and unseemly both are adjectives.

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

As adjectives, indecent and unseemly are synonyms defined as:

indecent and unseemly: not in keeping with accepted standards of what is right or proper in polite society

Other synonyms of indecent include indecorous, unbecoming, uncomely, untoward.

indecent (adjective)	unseemly (adjective)
offensive to good taste especially in sexual matters	not in keeping with accepted standards of what is right or proper in polite society
offending against sexual mores in conduct or appearance
not in keeping with accepted standards of what is right or proper in polite society