The word orthophosphate is playable in Scrabble®, but 1 blank substituting for the letter 'h' is required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Scrabble® Letter Score: 23
Highest Scoring Scrabble® Plays In The Letters orthophosphate
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Seven Letter Word Alert: (49 words)
apposer, earshot, hapters, hatshop, hatters, hearths, hoppers, hotpots, hotshot, hotspot, oophore, oospore, opposer, papoose, patters, perhaps, poopers, poorest, pothers, potshot, potters, prophet, propose, protest, reshoot, retoast, rotates, seaport, shatter, shooter, shopper, soother, spatter, spotter, stooper, stopper, strophe, tappers, taproot, tapster, teapots, teashop, tephras, threats, throats, toaster, tooters, toppers, toprope