nouns
octopus
octogon
adjective
obtuse
obsurd
Obesity, occupation, omelet, opinion, orange, organ and overcoat are common nouns. They begin with the letter o.
objectionable
Nouns are not describing words, adjectives are the words that describe noun; people is a noun. Some adjectives starting with O that describe people are:objectiveobliviousobsessedobtuseobviousoldopenopportunisticoriginalorneryostentatiousowlishSome nouns for people that start with O are:oboistoceanographerofficerOlympianopera singeropportunistophthalmologistorganistornithologistorthopedistoutsideroyster farmer
Examples of abstract nouns that begin with O are:obedienceoccurrenceoccupationoperationopinionorganizationoriginalityoncology
outstanding
· olympic
overheadoutdooroverwhelming
outstanding
obedient
outside
· overwhelming
· outstanding