Reconciliate is a term that refers to the unification of two parties or the restoration of amicable relations. In contrast to this, antonyms for the word reconciliate would be words that mean splitting, dividing, separating, or alienating. Some of the most common antonyms of reconciliate include estrange, disconnect, disunite, disharmonize, disaccord, and disassociate. These words can have negative connotations and imply that two parties are no longer on good terms. For instance, when people are estranged, they no longer have a close relationship with each other, while disunited implies that they are no longer in agreement on a particular matter.