Conciliatory is a word that has lots of synonyms, words of like meaning. And conciliatory is also a synonym for each of its similar words.
A group of synonyms can be compared to a group of playmates. Just as each person in the group can claim all the others in the group as playmates, so each word in a synonymous group can claim all the other words in the group as synonyms.
The word conciliatory is a synonym for all these words and more, according to context: placid, yielding, appeasing, assuaging, disarming, mollifying, pacific, placating, willing
And all the words conciliatory is synonymous with are synonyms for conciliatory, too.