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-ology is from the infinitive Logos which means 'to study'. It is understood that -ology is "the science or study of" a certain subject.

-onomy is from the Greek: Nomos, meaning law. Other sites say the suffix means "knowledge of"

The Concise Oxford defines '-logy' as denoting a subject of study or interest (much the same as above). It defines '-nomy' as denoting a specified area of knowledge or its laws (again, much like the above).

My opinion, which I have no good evidence for, is that '-nomy- denotes the observation of things as they are: Astronomy looks at the laws of the stars (the constellations and their movements). '-logy' is the practice of the subject: Astrology extrapolates "meaning" (if you believe that sort of thing) from the stars position. Gastroenterology or Radiology puts into practice what they know of a subject to give a result.

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Prefixes and Suffixes with their meanings and sample words?

List of SuffixesCommon SuffixWord EndingExamples & List of Common Suffixes-able-ad-ade-age-agogy-al-al-ality-an-ance-ancy-ant-ant-ar-ar-ard-ary-ary-arch-archy-ate-ate-ate-athlon-ation-ative-atory-bound-cide-city-cy-cycle-dom-ectomy-ed-ee-eer-eme-en-en-ence-ency-ent-ent-eous-er-ergy-ern-ery-ese-esque-ess-etic-fare-ful-gon-gry-holic-hood-ia-iable-ial-ian-iant-iate-ible-ibly-ic-ical-ics-id-ier-ify-ile-illion-ious-ing-ion-ish-ism-ist-ite-itive-itude-ity-ium-ive-ization / isation-ize / ise-land-less-like-ling-ly-man-ment-meter-metry-mony-most-nesia-ness-ocracy-ography-ologist-ology-onomy-or-ory-ose-ous-phone-scope-ship-shire-sion-some-ster-t-th-tion-ty-uary-ulent-ward-wise-wright-yComfortableTriadBlockadeGaragePedagogyFocalAppraisalSexualityUrbanAnnoyanceVacancyRelevantAssistantLinearLiarWizardMilitaryDictionaryMonarchAnarchyFortunateCertificateConcentrateDecathlonConcentrationLucrativeLaboratoryOutboundSuicideAtrocityDiplomacyHydrocycleKingdomVasectomyBoredEmployeePrivateerMorphemeLeukemiaGoldenIndependenceFrequencyDifferentResidentCourteousWriterEnergySouthernMachineryChinesePicturesqueActressSympatheticWarfareHopefulPentagonAngryAlcoholicBrotherhoodManiaSociableSpecialItalianDefiantDeviateIncredibleResponsiblyHistoricHistoricalEconomicsCandidCashierClarifyTactileMillionAmbitiousPlayingActionFoolish, TallishEnglishBuddhismDentistSocialiteSensitiveAttitudeFormalityCalciumAggressiveOrganization/OrganisationIdolize/IdoliseFinlandCarelessChildlikeDucklingMonthlyFiremanGovernmentThermometerGeometryTestimonyInnermostPolynesiaKindness, DarknessDemocracyPhotographyArchaeologistBiologyAstronomyGovernorHistoryGlucoseNervousTelephoneTelescopeFriendshipOxfordshireDecisionAwesomeGangsterBurntGrowthIntroductionLoyaltyJanuaryFraudulentInwardClockwisePlaywrightSunnyCommon SuffixWord EndingExamples & List of Common SuffixesList of Suffixes


Related Questions

What do hens study in collage?

Egg-onomy.


What are some words that end in the suffix onomy?

Economy


What are some words end with the suffix onomy?

agronomy. astronomy. autonomy. deuteronomy. economy. gastronomy. taxonomy. troponomy.


What does onomy mean?

The suffix "nomy" comes from nomos, a greek work meaning "to regulate or arrange". Astronomy is a word derived from the Greek words "ASTRO" (star) and "NOMOS".


Prefixes and Suffixes with their meanings and sample words?

List of SuffixesCommon SuffixWord EndingExamples & List of Common Suffixes-able-ad-ade-age-agogy-al-al-ality-an-ance-ancy-ant-ant-ar-ar-ard-ary-ary-arch-archy-ate-ate-ate-athlon-ation-ative-atory-bound-cide-city-cy-cycle-dom-ectomy-ed-ee-eer-eme-en-en-ence-ency-ent-ent-eous-er-ergy-ern-ery-ese-esque-ess-etic-fare-ful-gon-gry-holic-hood-ia-iable-ial-ian-iant-iate-ible-ibly-ic-ical-ics-id-ier-ify-ile-illion-ious-ing-ion-ish-ism-ist-ite-itive-itude-ity-ium-ive-ization / isation-ize / ise-land-less-like-ling-ly-man-ment-meter-metry-mony-most-nesia-ness-ocracy-ography-ologist-ology-onomy-or-ory-ose-ous-phone-scope-ship-shire-sion-some-ster-t-th-tion-ty-uary-ulent-ward-wise-wright-yComfortableTriadBlockadeGaragePedagogyFocalAppraisalSexualityUrbanAnnoyanceVacancyRelevantAssistantLinearLiarWizardMilitaryDictionaryMonarchAnarchyFortunateCertificateConcentrateDecathlonConcentrationLucrativeLaboratoryOutboundSuicideAtrocityDiplomacyHydrocycleKingdomVasectomyBoredEmployeePrivateerMorphemeLeukemiaGoldenIndependenceFrequencyDifferentResidentCourteousWriterEnergySouthernMachineryChinesePicturesqueActressSympatheticWarfareHopefulPentagonAngryAlcoholicBrotherhoodManiaSociableSpecialItalianDefiantDeviateIncredibleResponsiblyHistoricHistoricalEconomicsCandidCashierClarifyTactileMillionAmbitiousPlayingActionFoolish, TallishEnglishBuddhismDentistSocialiteSensitiveAttitudeFormalityCalciumAggressiveOrganization/OrganisationIdolize/IdoliseFinlandCarelessChildlikeDucklingMonthlyFiremanGovernmentThermometerGeometryTestimonyInnermostPolynesiaKindness, DarknessDemocracyPhotographyArchaeologistBiologyAstronomyGovernorHistoryGlucoseNervousTelephoneTelescopeFriendshipOxfordshireDecisionAwesomeGangsterBurntGrowthIntroductionLoyaltyJanuaryFraudulentInwardClockwisePlaywrightSunnyCommon SuffixWord EndingExamples & List of Common SuffixesList of Suffixes


What is the definition of nomos?

Nomos is a Greek term that can be translated as "law" or "custom." It refers to the social and cultural norms or laws that govern behavior within a community. In ancient Greek philosophy, nomos was contrasted with physis (nature) as a way to understand the principles that guide human society.