| conservancy | (noun) the official conservation of trees and soil and rivers etc. | - |
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| (noun) a commission with jurisdiction over fisheries and navigation in a port or river | - |
| conservation | (noun) the preservation and careful management of the environment and of natural resources | - |
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| (noun) (physics) the maintenance of a certain quantities unchanged during chemical reactions or physical transformations | - |
| (noun) an occurrence of improvement by virtue of preventing loss or injury or other change | Synonyms: preservation |
| conservationist | (noun) someone who works to protect the environment from destruction or pollution | Synonyms: environmentalist |
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| conservatism | (noun) a political or theological orientation advocating the preservation of the best in society and opposing radical changes | Synonyms: conservativism |
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| conservative | (noun) a person who is reluctant to accept changes and new ideas | Synonyms: conservativist |
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| conservativism | (noun) a political or theological orientation advocating the preservation of the best in society and opposing radical changes | Synonyms: conservatism |
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| conservativist | (noun) a person who is reluctant to accept changes and new ideas | Synonyms: conservative |
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| conservatoire | (noun) a schoolhouse with special facilities for fine arts | Synonyms: conservatory |
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| conservator | (noun) the custodian of a collection (as a museum or library) | Synonyms: curator |
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| (noun) someone appointed by a court to assume responsibility for the interests of a minor or incompetent person | - |
| conservatory | (noun) a greenhouse in which plants are arranged in a pleasing manner | Synonyms: hothouse, indoor garden |
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| (noun) a schoolhouse with special facilities for fine arts | Synonyms: conservatoire |
| (noun) the faculty and students of a school specializing in one of the fine arts | - |
| conserve | (noun) fruit preserved by cooking with sugar | Synonyms: conserves, preserve, preserves |
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| conserves | (noun) fruit preserved by cooking with sugar | Synonyms: conserve, preserve, preserves |
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| deservingness | (noun) the quality of being deserving (e.g., deserving assistance) | Synonyms: merit, meritoriousness |
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| disservice | (noun) an act intended to help that turns out badly | Synonyms: ill service, ill turn |
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| maidservant | (noun) a female domestic | Synonyms: amah, housemaid, maid |
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| manservant | (noun) a man servant | - |
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| neoconservatism | (noun) an approach to politics or theology that represents a return to a traditional point of view (in contrast to more liberal or radical schools of thought of the 1960s) | - |
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| neoconservative | (noun) a conservative who subscribes to neoconservatism | Synonyms: neocon |
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| nonobservance | (noun) a lack of conformity with law or custom or practice etc. | - |
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| observance | (noun) the act of observing; taking a patient look | Synonyms: observation, watching |
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| (noun) conformity with law or custom or practice etc. | Synonyms: honoring, honouring |
| (noun) the act of noticing or paying attention | Synonyms: notice, observation |
| (noun) a formal event performed on a special occasion | Synonyms: ceremonial, ceremonial occasion, ceremony |
| observation | (noun) the act of observing; taking a patient look | Synonyms: observance, watching |
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| (noun) the act of making and recording a measurement | - |
| (noun) the act of noticing or paying attention | Synonyms: notice, observance |
| (noun) facts learned by observing | - |
| (noun) a remark expressing careful consideration | Synonyms: reflection, reflexion |
| observatory | (noun) a building designed and equipped to observe astronomical phenomena | - |
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| (noun) a structure commanding a wide view of its surroundings | Synonyms: lookout, lookout station, observation tower |
| observer | (noun) a person who becomes aware (of things or events) through the senses | Synonyms: beholder, perceiver, percipient |
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| (noun) an expert who observes and comments on something | Synonyms: commentator |
| preservation | (noun) the activity of protecting something from loss or danger | Synonyms: saving |
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| (noun) an occurrence of improvement by virtue of preventing loss or injury or other change | Synonyms: conservation |
| (noun) a process that saves organic substances from decay | - |
| (noun) the condition of being (well or ill) preserved | - |
| preservationist | (noun) someone who advocates the preservation of historical sites or endangered species or natural areas | - |
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| preservative | (noun) a chemical compound that is added to protect against decay or decomposition | - |
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| preserve | (noun) fruit preserved by cooking with sugar | Synonyms: conserve, conserves, preserves |
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| (noun) a reservation where animals are protected | - |
| (noun) a domain that seems to be specially reserved for someone | - |
| preserver | (noun) rescue equipment consisting of a buoyant belt or jacket to keep a person from drowning | Synonyms: flotation device, life preserver |
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| (noun) a skilled worker who is employed to restore or refinish buildings or antique furniture | Synonyms: refinisher, renovator, restorer |
| (noun) someone who keeps safe from harm or danger | - |
| (noun) a cook who preserves fruits or meat | - |
| preserves | (noun) fruit preserved by cooking with sugar | Synonyms: conserve, conserves, preserve |
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| reservation | (noun) the act of keeping back or setting aside for some future occasion | - |
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| (noun) the act of reserving (a place or passage) or engaging the services of (a person or group) | Synonyms: booking |
| (noun) an unstated doubt that prevents you from accepting something wholeheartedly | Synonyms: arriere pensee, mental reservation |
| (noun) something reserved in advance (as a hotel accommodation or a seat on a plane etc.) | - |
| (noun) a statement that limits or restricts some claim | Synonyms: qualification |
| (noun) the written record or promise of an arrangement by which accommodations are secured in advance | - |
| (noun) a district that is reserved for particular purpose | Synonyms: reserve |
| reserve | (noun) the trait of being uncommunicative; not volunteering anything more than necessary | Synonyms: reticence, taciturnity |
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| (noun) formality and propriety of manner | Synonyms: modesty |
| (noun) armed forces that are not on active duty but can be called in an emergency | Synonyms: military reserve |
| (noun) a district that is reserved for particular purpose | Synonyms: reservation |
| (noun) an athlete who plays only when a starter on the team is replaced | Synonyms: second-stringer, substitute |
| (noun) something kept back or saved for future use or a special purpose | Synonyms: backlog, stockpile |
| (noun) (medicine) potential capacity to respond in order to maintain vital functions | - |
| reserves | (noun) civilians trained as soldiers but not part of the regular army | Synonyms: militia |
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| reservist | (noun) a member of a military reserve | - |
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| reservoir | (noun) tank used for collecting and storing a liquid (as water or oil) | - |
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| (noun) lake used to store water for community use; a lake (natural or artificial) used to store water and used as a source of water | Synonyms: artificial lake, man-made lake |
| (noun) anything (a person or animal or plant or substance) in which an infectious agent normally lives and multiplies | Synonyms: source |
| (noun) a large or extra supply of something | - |
| serval | (noun) slender long-legged African wildcat having large untufted ears and tawny black-spotted coat | Synonyms: Felis serval |
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| servant | (noun) a person working in the service of another (especially in the household) | Synonyms: retainer |
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| (noun) in a subordinate position | Synonyms: handmaid, handmaiden |
| serve | (noun) (sports) a stroke that puts the ball in play | Synonyms: service |
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| server | (noun) utensil used in serving food or drink | - |
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| (noun) (computer science) a computer that provides client stations with access to files and printers as shared resources to a computer network | Synonyms: host |
| (noun) a person whose occupation is to serve at table (as in a restaurant) | Synonyms: waiter |
| (noun) (court games) the player who serves to start a point | - |
| service | (noun) an act of help or assistance; something (such as a tool, software or system) used to render said help or assistance | - |
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| (noun) the act of public worship following prescribed rules | Synonyms: divine service, religious service |
| (noun) (sports) a stroke that puts the ball in play | Synonyms: serve |
| (noun) the act of mating by male animals | Synonyms: servicing |
| (noun) the act of delivering a writ or summons upon someone | Synonyms: service of process, serving |
| (noun) periodic maintenance on a car or machine | Synonyms: inspection and repair, overhaul |
| (noun) the performance of duties by a waiter or servant | - |
| (noun) employment in or work for another | - |
| (noun) work done by one person or group that benefits another | - |
| (noun) (law) the acts performed by an English feudal tenant for the benefit of his lord which formed the consideration for the property granted to him | - |
| (noun) tableware consisting of a complete set of articles (silver or dishware) for use at table | Synonyms: table service |
| (noun) a means of serving | Synonyms: avail, help |
| (noun) a force that is a branch of the armed forces | Synonyms: armed service, military service |
| (noun) a company or agency that performs a public service; subject to government regulation | - |
| serviceability | (noun) the quality of being able to provide good service | Synonyms: serviceableness, usability, usableness, useableness |
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| serviceableness | (noun) the quality of being able to provide good service | Synonyms: serviceability, usability, usableness, useableness |
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| serviceberry | (noun) edible purple or red berries | Synonyms: juneberry, saskatoon, shadberry |
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| (noun) any of various North American trees or shrubs having showy white flowers and edible blue-black or purplish fruit | Synonyms: Juneberry, service tree, shadblow, shadbush |
| serviceman | (noun) someone who serves in the armed forces; a member of a military force | Synonyms: man, military man, military personnel |
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| services | (noun) performance of duties or provision of space and equipment helpful to others | - |
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| servicing | (noun) the act of mating by male animals | Synonyms: service |
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| serviette | (noun) a small piece of table linen that is used to wipe the mouth and to cover the lap in order to protect clothing | Synonyms: napkin, table napkin |
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| servility | (noun) abject or cringing submissiveness | Synonyms: obsequiousness, subservience |
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| serving | (noun) the act of delivering a writ or summons upon someone | Synonyms: service, service of process |
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| (noun) an individual quantity of food or drink taken as part of a meal | Synonyms: helping, portion |
| servitor | (noun) someone who performs the duties of an attendant for someone else | - |
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| servitude | (noun) state of subjection to an owner or master or forced labor imposed as punishment | - |
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| servo | (noun) control system that converts a small mechanical motion into one requiring much greater power; may include a negative feedback system | Synonyms: servomechanism, servosystem |
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| servomechanism | (noun) control system that converts a small mechanical motion into one requiring much greater power; may include a negative feedback system | Synonyms: servo, servosystem |
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| servosystem | (noun) control system that converts a small mechanical motion into one requiring much greater power; may include a negative feedback system | Synonyms: servo, servomechanism |
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| subservience | (noun) abject or cringing submissiveness | Synonyms: obsequiousness, servility |
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| (noun) the condition of being something that is useful in reaching an end or carrying out a plan | - |
| (noun) in a subservient state | Synonyms: subservientness |
| subservientness | (noun) in a subservient state | Synonyms: subservience |
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| timeserver | (noun) one who conforms to current ways and opinions for personal advantage | - |
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| ultraconservative | (noun) an extreme conservative; an opponent of progress or liberalism | Synonyms: extreme right-winger, reactionary |
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