"Snatch up" is a phrasal verb that means to grab quickly or seize something in a sudden and swift manner. There are several synonyms for this word, including "grab", "seize", "take", "catch", "acquire", "clutch", "grasp", "pluck", "snag", "nab", and "hook". All these words convey a sense of urgency and the need to act quickly to secure something before it disappears or becomes unavailable. They are commonly used in situations where there is fierce competition or limited availability, such as grabbing the last item on a clearance shelf, seizing an opportunity before it passes, or taking advantage of a temporary offer or discount.