15-letter words containing s, y, a, d, m
- orangeman's day — the 12th of July, celebrated by Protestants in Northern Ireland to commemorate the anniversary of the Battle of the Boyne (1690)
- orangemen's day — July 12, an annual celebration in Northern Ireland and certain cities having a large Irish section, especially Liverpool, to mark both the victory of William III over James II at the Battle of the Boyne, July 1, 1690, and the Battle of Augbrim, July 12, 1690.
- ordinary seaman — a seaman insufficiently skilled to be classified as an able-bodied seaman. Abbreviation: O.D., O.S., o.s.
- pamprodactylous — having all four toes directed forward, as in swifts and colies.
- pseudo-military — of, for, or pertaining to the army or armed forces, often as distinguished from the navy: from civilian to military life.
- pseudomutuality — a relationship between two persons in which conflict of views or opinions is solved by simply ignoring it
- pyramid selling — Pyramid selling is a method of selling in which one person buys a supply of a particular product direct from the manufacturer and then sells it to a number of other people at an increased price. These people sell it on to others in a similar way, but eventually the final buyers are only able to sell the product for less than they paid for it.
- pyrimidine base — any of a number of similar compounds having a basic structure that is derived from pyrimidine, including cytosine, thymine, and uracil, which are constituents of nucleic acids
- radar astronomy — the branch of astronomy that uses radar to map the surfaces of planetary bodies, as the moon and Venus, and to determine periods of rotation.
- radial symmetry — a basic body plan in which the organism can be divided into similar halves by passing a plane at any angle along a central axis, characteristic of sessile and bottom-dwelling animals, as the sea anemone and starfish.
- radio astronomy — the branch of astronomy that utilizes extraterrestrial radiation in radio wavelengths rather than visible light for the study of the universe.
- sahitya akademi — a body set up by the Government of India for cultivating literature in Indian languages and in English
- secondary metal — metal derived wholly or in part from scrap.
- secondary xylem — xylem derived from the cambium during secondary growth.
- self-admittedly — admitting to a specific charge or accusation; self-confessed: a self-admitted spy.
- semicylindrical — of, relating to, or having the shape of a semicylinder
- semidocumentary — a film or television programme that is fictional but includes many factual events or details
- social dynamics — the study of social processes, especially social change.
- sodium ethylate — a white, hygroscopic powder, C 2 H 5 ONa, that is decomposed by water into sodium hydroxide and alcohol: used chiefly in organic synthesis.
- stand-up comedy — telling jokes to an audience
- summer holidays — the time when children do not go to school in the summer
- swiss army code — (programming, humour) Code for an application that is suffering from feature creep. Swiss Army Code does many things, but does none of them well.
- tristram shandy — a novel (1759–67) by Laurence Sterne.