There are various synonyms for the word "ex-postulated" that can be used depending on the context of the sentence. Some common synonyms for this word include "postulated," "assumed," "hypothesized," "presumed," "imagined," "conjectured," "supposed," and "speculated." These words indicate that someone has made an inference or a guess about something based on limited information or evidence. They suggest that the person is not entirely certain about the validity of their statement and that there may be room for further investigation or revision. Overall, the use of synonyms can help to bring nuance and variety to one's writing and make it more engaging for readers.