| ASTROTOURISTS | • astrotourists n. Plural of astrotourist. • ASTROTOURIST n. one who pays to visit space as a tourist.
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| CONSTATATIONS | • constatations n. Plural of constatation. • CONSTATATION n. a statement, assertion.
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| CONSTITUTIONS | • constitutions n. Plural of constitution. • CONSTITUTION n. an established law or custom.
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| CONTESTATIONS | • contestations n. Plural of contestation. • CONTESTATION n. controversy, debate.
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| EXTORTIONISTS | • extortionists n. Plural of extortionist. • EXTORTIONIST n. one who practises extortion.
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| ORTHODONTISTS | • orthodontists n. Plural of orthodontist. • ORTHODONTIST n. one who practises orthodontics.
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| ORTHOPTERISTS | • orthopterists n. Plural of orthopterist. • ORTHOPTERIST n. a student of insects.
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| OSTEOPATHISTS | • osteopathists n. Plural of osteopathist. • OSTEOPATHIST n. a practitioner of osteopathy, also OSTEOPATH.
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| PHOTOMETRISTS | • photometrists n. Plural of photometrist. • PHOTOMETRIST n. one who practises photometry, that branch of science which treats of the measurement of the intensity of light.
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| PHOTOSETTINGS | • PHOTOSETTING n. composing (matter) by projecting film from which a printing plate is made. | 
| PROSTITUTIONS | • prostitutions n. Plural of prostitution. • PROSTITUTION n. the act or practice of engaging in promiscuous sexual relations esp. for money.
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| PROTESTATIONS | • protestations n. Plural of protestation. • PROTESTATION n. an avowal or solemn declaration.
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| SOMATOSTATINS | • somatostatins n. Plural of somatostatin. • SOMATOSTATIN n. a polypeptide neurohormone.
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| STETHOSCOPIST | • stethoscopist n. One skilled in the use of the stethoscope. • STETHOSCOPIST n. one who uses a stethoscope.
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| STOMATOLOGIST | • stomatologist n. (Medicine) A practitioner of stomatology. • STOMATOLOGIST n. a person who works in stomatology.
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| STROMATOLITES | • stromatolites n. Plural of stromatolite. • STROMATOLITE n. a rounded, multilayered structure, found in rocks dating back at least 2800 million years, having present-day equivalents that result from the growth, under special conditions, of blue-green algae.
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| TERATOLOGISTS | • teratologists n. Plural of teratologist. • TERATOLOGIST n. a student of teratology.
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| TOTALISATIONS | • totalisations n. Plural of totalisation. • TOTALISATION n. the act of totalising, also TOTALIZATION.
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