| COAUTHORSHIP | • coauthorship n. Joint authorship by two or more authors. • COAUTHORSHIP n. the role of coauthor.
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| HAEMORRHOIDS | • haemorrhoids n. A pathological condition caused by painful masses of dilated veins in swollen anal tissue. • haemorrhoids n. Plural of haemorrhoid.
 • hæmorrhoids n. Plural of hæmorrhoid.
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| HARMONIPHONS | • harmoniphons n. Plural of harmoniphon. • HARMONIPHON n. a keyboard wind instrument with reeds, also HARMONIPHONE.
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| HIEROPHOBIAS | • HIEROPHOBIA n. a morbid fear of sacred things. | 
| HOLOGRAPHIES | • holographies n. Plural of holography. • HOLOGRAPHY n. the technique or process of making or using holograms.
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| HOLOPHRASTIC | • holophrastic adj. (Linguistics, of a sentence) Consisting of a single word, such as "Go." or "Whatever.". • holophrastic adj. (Linguistics) Pertaining to the stage of development where a child produces simple one-word utterances.
 • HOLOPHRASTIC adj. of or like a holophrase, a single word expressing a sentence or phrase.
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| HOLOTHURIANS | • holothurians n. Plural of holothurian. • HOLOTHURIAN n. any member of a class of wormlike unarmoured echinoderms, aka sea cucumbers.
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| HOMOGRAPHIES | • homographies n. Plural of homography. • HOMOGRAPHY n. a type of transformation that maps straight lines onto another plane.
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| HOROGRAPHIES | • HOROGRAPHY n. the art of constructing sundials or clocks. | 
| HYDROPHOBIAS | • hydrophobias n. Plural of hydrophobia. • HYDROPHOBIA n. the morbid fear of water, as in rabies victims.
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| OPISTHOGRAPH | • opisthograph n. (Historical) Any early document (such as a roll of papyrus) that has writing on the back as well as the front. • opisthograph n. (Historical) Any early book that has letterpress printing on both sides of the page.
 • OPISTHOGRAPH n. a manuscript or slab inscribed on both back and front.
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| RHINOPHONIAS | • RHINOPHONIA n. a nasal tone to the voice which is caused by a defect in the nasal passages. | 
| RHINORRHOEAS | • rhinorrhoeas n. Plural of rhinorrhoea. • RHINORRHOEA n. continuous nasal catarrh.
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| RHIZOPHAGOUS | • rhizophagous adj. Feeding on roots. • RHIZOPHAGOUS adj. feeding on roots.
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