16-Letter Words Starting with 'OR'

A reference list of 20 English 16-letter words starting with 'OR', such as Organophosphorus, Orthopsychiatric, Orthosymmetrical and Orthosubstituted. Use the interactive filters below to sort alphabetically or by length, and check definitions for every word.

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Starts with ORB1 words
orbitosphenoidal
Starts with ORC1 words
orchiencephaloma
Starts with ORD1 words
ordinatomaculate
Starts with ORG4 words
organizationally
organophosphorus
organoleptically
organotropically
Starts with ORN6 words
ornithologically
ornithobiography
ornithoidichnite
ornithorhynchous
ornithocephalous
ornithocoprolite
Starts with ORT7 words
orthographically
orthopsychiatric
orthosymmetrical
orthosubstituted
orthodoxicalness
orthopterologist
orthogenetically
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