They all have a reading that is the same backwards.
多 TA, oo(i) - many, much
燃 NEN, mo(eru), mo(yasu) - burn
撃 GEKI, u(tsu) - attack, fire, shoot
淡 TAN, awa(i) - light, feint, pale, transitory
飽 HOU, a(kiru), a(kasu) - tire, get bored, bore, make tired