This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Simple past tense and past participle of tier.

adj. Having or made of tiers

adj. having or arranged in tiers

"I think that long term tiered pricing is the only way you're going to be able to justify the investment in capacity and technology to support the data river that's out there."

tiered    tiering    tiers   

worker    rival    challenger    competitor    contender    competition    rope    bed    layer   

ground tier    tiers of a cable   

tire   

pinafore    rot   

Here    bier    blogosphere    buccaneer    disappear    ear    endear    hear    here    keir   

row    terrace    ledge    rim    segment    stack    shelf    dome    rampart    echelon