O·rel 
(ô-rĕl, ō-rĕl, ôr-yôl) or Or·yol (ôr-yôl)
(ô-rĕl, ō-rĕl, ôr-yôl) or Or·yol (ôr-yôl) A city of western Russia on the Oka River south of Moscow. Founded in 1566 as a fortified settlement to protect the southern border of Muscovy against the Tatars, it is today an industrial center and a railroad junction.
- hyperthermophile
- hyperthermophilic
- hyperthyroid
- hyperthyroidism
- hypertonia
- hypertonic
- hypertonicity
- hypertrophic
- hypertrophy
- hyperuricemia
- hypervalent
- hyperventilate
- hyperventilation
- hypervitaminosis
- hypesthesia
- hypesthesia
- hypethral
- hypethral
- hypha
- hyphal
- hyphen
- hyphenate
- hyphenated
- hyphenation
- hypn-