Extraforaneous is a rather uncommon word, making it difficult to identify direct synonyms. However, we can explore similar words that convey similar meanings. "Extemporaneous" is one such term, referring to something done or spoken without prior preparation. It carries the idea of spontaneity, which may align with the context of extraforaneous, even though it doesn't share an exact meaning. Two other potential synonyms could be "improvised" and "off-the-cuff", both describing actions or remarks made on the spot, without planning or script. While the direct synonym for extraforaneous might elude us, these alternative words capture its essence of impromptu or unprepared actions or statements.