11 Letter Countable Nouns Starting with OBS

Browse 10 valid English 11 letter countable nouns that start with OBS, from Observation, Obstruction, Observatory, Obscuration, Obsessional, Obscurement and Obstipation to rarer terms. Check definitions and spelling below, or visit our noun grammar guide to review singular and plural count rules.

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Starts with OBSC
2 words
obscuration
obscurement
Starts with OBSE4 words
observation
observatory
obsessional
obsecration
Starts with OBSI
1 words
obsignation
Starts with OBST3 words
obstruction
obstipation
obstriction

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