• lxxviii,
• lxviiii,
• xxviii,
• xxxvii,
• xcviii,
• xcuiii,
• xlivii,
• xlriii,
• xlwiii,
• xxviiu,
• xxbiii,
• xxgiii,
• xxfiii,
• zxxviii,
• xzxviii,
• cxxviii,
• xdxviii,
• sxxviii,
• xsxviii,
• xxzviii

• xxiv,
• xxxvi,
• xxxvii,
• xxxiv,
• xcviii,
• xxvii,
• xxxviii,
• xxvi,
• xxxv,
• xxv.

The word "xxviii" is a Roman numeral representing the number 28. It is not typically used as an adjective. However, if you are looking for an adjective related to the number 28, you could use "twenty-eighth".