Abstract Nouns That Start with O and End with IS

Explore 49 verified English abstract nouns starting with O and ending with IS, including Oasis, Osteoporosis, Osmosis, Osteoarthritis, Overemphasis, Otitis and Overdiagnosis. Sort these idea words for emotions, qualities, and intangible concepts by word length for essay writing, poetry, and expressive communication below, or explore examples of abstract vs. concrete nouns in our noun grammar guide.

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Starts with OA
1 words
oasis
Starts with OL
2 words
oliguresis
olecranarthritis
Starts with OM3 words
omphaloskepsis
omphalitis
omphalophlebitis
Starts with ON7 words
oncogenesis
ontogenesis
onomatopoiesis
oncolysis
onchocerciasis
onychocryptosis
onychitis
Starts with OO
2 words
oogenesis
oophoritis
Starts with OP3 words
ophthalmodiagnosis
ophthalmomyositis
ophthalmoneuritis
Starts with OR7 words
organogenesis
orogenesis
orthopraxis
orthogenesis
orexis
orchesis
orthoaxis
Starts with OS16 words
osteoporosis
osmosis
osteoarthritis
osteonecrosis
osteogenesis
osteolysis
osteoarthrosis
osteopetrosis
osteitis
osmidrosis
osteofibrosis
osteoclasis
ostosis
osteosis
osteoperiostitis
osteohalisteresis
Starts with OT
2 words
otitis
otosclerosis
Starts with OV4 words
overemphasis
overdiagnosis
overanalysis
ovaritis
Starts with OX
1 words
oxyuriasis
Starts with OZ
1 words
ozonolysis

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