Countable Nouns That Start with OB and End with ION

Explore 32 verified English countable nouns starting with OB and ending with ION, including Observation, Obligation, Objection, Obsession, Obstruction, Objectification and Obliteration. Sort these count nouns with singular and plural forms by word length for ESL grammar practice, determiner usage, and plural spelling 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 OBJ
6 words
objection
objectification
objectivation
objectivization
objurgation
objuration
Starts with OBL
4 words
obligation
obliteration
oblation
obliquation
Starts with OBN
1 words
obnubilation
Starts with OBS
9 words
observation
obsession
obstruction
obscuration
obstipation
obsoletion
obsecration
obsignation
obstriction
Starts with OBT
3 words
obtrusion
obturation
obtestation
Starts with OBU
1 words
obumbration
Starts with OBV
4 words
obviation
obversion
obvention
obvolution

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