Antonyms for Jamaica Express, a term typically associated with speed, might include 'slow,' 'leisurely,' or 'unhurried.' Other contrasting words might include 'relaxed,' 'casual,' or 'gentle.' While Jamaica Express suggests a sense of urgency or quickness, opposite terms might convey a sense of calm or ease. Antithetical words could also include 'delayed,' 'interrupted,' or 'hindered,' all of which suggest an interruption or obstacle. Overall, the antonyms for Jamaica Express may vary depending on which specific aspects of the phrase are being contrasted, but they would all suggest a slowing or easing of pace.