Countable Nouns Starting with OP and Containing D

Explore 21 verified English countable nouns starting with OP and containing D, including Opioid, Operand, Opcode, Ophidian, Openside, Ophidiophobia and Oppidum. 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 OPC
1 words
opcode
Starts with OPE
3 words
operand
openside
opeidoscope
Starts with OPH
12 words
ophidian
ophidiophobia
ophidiophobic
ophidiophile
ophidiophobe
ophiurid
ophicleide
ophiuroid
ophthalmodynamometer
ophthalmodiagnosis
ophidiarium
ophthalmodiastimeter
Starts with OPI
2 words
opioid
opisthodomos
Starts with OPO
1 words
opodeldoc
Starts with OPP
2 words
oppidum
oppidan

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