-ium /-i-əm/

1. Forming nouns denoting: a metallic element, as in plutonium
2. A group forming a positive ion, as in ammonium
3. A biological structure, as in conidium

• addax
• addaxes
• addebted
• added
• addeem
• addeemed
• addeeming
• addeems
• addend
• addenda
• addends
• addendum
• adder
• adders
• adderstone
• adderstones
• adder's-tongue
• adder's-wort
• adderwort
• add fuel to the fire
• add fuel to the fires
• addict
• addicted
• addictedness
• addictednesses