"Y class" is a term that is commonly used to refer to a particular class or category of items, features, or services that are of a specific type or quality. Some synonyms for "Y class" might include "economy class," "basic class," "budget class," or "standard class." These terms are often used to describe the most basic or affordable options within a particular industry or market. For example, in the airline industry, "Y class" might refer to the standard economy seating options that are available to passengers. Similarly, in the hotel industry, "budget class" or "standard class" might refer to rooms that are more affordable or offer fewer luxury amenities than higher-priced alternatives.