depends on some combination of the 2 words and context, you can say 这个人很有礼貌 or 这个人很客气,they are same but you can't say 这个人礼貌 or 这个人很有客气 you can say 他很有礼貌or 他很客气。 but you can't say 他很礼貌 or 他有客气，this would be kind of weird but chinese person can understand it.