2362. Why do these five characters all seem so reflective? 雷 豆 豊 帯 固

They all look the same when reflected in a mirror!  

雷  RAI, kaminari - thunder

豆  TOU, ZU, mame - bean, pea

豊  HOU, yuta(ka) - abundant, rich

帯  TAI, obi, obi(ru) - belt, sash, be entrusted with

固  KO, kata(i), kata(maru) - hard, harden