Words That Start with O and End with UM

Browse 49 playable English words starting with O and ending with UM, including Optimum, Opium, Opossum, Ovum, Opprobrium, Odium and Osmium. Validated for Scrabble, Wordle, crosswords, and daily writing, check letter counts and definitions below.

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Starts with OA
1 words
oakum
Starts with OC
1 words
oceanarium
Starts with OD3 words
odium
odeum
odontoglossum
Starts with OF
1 words
offscum
Starts with OI
1 words
oidium
Starts with OL
2 words
oleum
olibanum
Starts with OM5 words
omnium
omentum
omasum
ommatidium
ommateum
Starts with ON3 words
onium
oncidium
onychium
Starts with OO
1 words
oogonium
Starts with OP10 words
optimum
opium
opossum
opprobrium
operculum
oppidum
opusculum
opsonium
ophidiarium
ophthalmophyllum
Starts with OR8 words
organum
orichalcum
origanum
ornithogalum
orarium
organistrum
orontium
ordalium
Starts with OS9 words
osmium
ostium
osculum
osmiridium
ostensorium
osteospermum
ossarium
osmeterium
osteoglossum
Starts with OU
1 words
outsum
Starts with OV
1 words
ovum
Starts with OX
2 words
oxonium
oxypetalum

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Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.