Countable Nouns Starting with OB and Containing IO

Explore 35 verified English countable nouns starting with OB and containing IO, including Observation, Obligation, Objection, Obsession, Obstruction, Objectification and Obliteration. Browse these count nouns with singular and plural forms below, or review singular and plural count rules in our noun grammar guide.

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Starts with OBD
2 words
obduction
obduration
Starts with OBE
1 words
obelion
Starts with OBF
1 words
obfuscation
Starts with OBJ6 words
objection
objectification
objectivation
objectivization
objurgation
objuration
Starts with OBL4 words
obligation
obliteration
oblation
obliquation
Starts with OBN
1 words
obnubilation
Starts with OBS12 words
observation
obsession
obstruction
obstructionist
obscuration
obsessional
obstipation
obsoletion
obsecration
obsignation
obsessionist
obstriction
Starts with OBT3 words
obtrusion
obturation
obtestation
Starts with OBU
1 words
obumbration
Starts with OBV4 words
obviation
obversion
obvention
obvolution

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