2578. How would you describe these characters? 強 暑 濃 堅 麗

Just use them. They are all adjectives!  

強  KYOU, GOU, tsuyo(i), tsuyo(meru), shi(iru) - strong, force

暑  SHO, atsu(i) - hot (weather)

濃  NOU, ko(i) - dark, thick, strong flavour

堅  KEN, kata(i) - firm, hard, solid

麗  REI, uruwa(shii) - beautiful, pretty