Countable Nouns Starting with OB and Containing ON

Browse 37 valid English countable nouns starting with OB and containing ON, from Observation, Obligation, Objection, Obsession, Obstruction, Oblong and Objectification to rarer terms. Check definitions and spelling below, or visit our noun grammar guide to review singular and plural count rules.

Refine list...
JUMP:
Sort:
Group:
Case:
View:
JUMP TO:
Select any word to view available definitions & photosSelect any word for details
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 OBL6 words
obligation
oblong
obliteration
oblation
oblongata
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

•Browse Countable Nouns by Letter (A to Z)

Select a starting letter to browse countable nouns
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWordsVocabulary HubPositive WordsNegative Words
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
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.