Iridiums

1 clue
Precious metals
Similar answers:
Alliums
Amediumsocalled
Aquariums
Atriums
Berylliumsymbol
Cafetoriums
Condominiums
Craniums
Elysiums
Emporiums
Encomiums
Erbiums
Geraniums
Gymnasiums
Irid
Iride
Irides
Iridesce
Iridescent
Iridescentdream