patina

noun 0.799

tarnishing

noun 0.567

bronzing

noun 0.550

tinning

noun 0.541

passivation

noun 0.537

varnishing

noun 0.537

tarnish

noun 0.537

verdigris

noun 0.535

coppering

noun 0.530

tannage

noun 0.530

coloration

noun 0.529

burnishing

noun 0.527

nitriding

noun 0.519

lacquering

noun 0.518

cyanation

noun 0.507

pigmentation

noun 0.505

nitration

noun 0.505

enameling

noun 0.503