12-letter words that end in a
- smoking area — a designated area in which smoking is permitted
- social media — websites and other online means of communication that are used by large groups of people to share information and to develop social and professional contacts: Many businesses are utilizing social media to generate sales.
- somaesthesia — sensory perception of bodily feelings like touch, pain, position of the limbs, etc
- sound camera — a motion-picture camera that is capable of photographing silently at the normal speed of 24 fps and operating in synchronization with separate audio recording equipment.
- south africa — Republic of, a country in S Africa; member of the Commonwealth of Nations until 1961. 472,000 sq. mi. (1,222,480 sq. km). Capitals: Pretoria and Cape Town.
- south arabia — Protectorate of, a former protectorate of Great Britain in S Arabia, now part of the Republic of Yemen.
- south dakota — a state in the N central United States: a part of the Midwest. 77,047 sq. mi. (199,550 sq. km). Capital: Pierre. Abbreviation: SD (for use with zip code), S. Dak.
- spade guinea — a guinea decorated with a spade-shaped shield, coined during the reign of George III
- spasmophilia — a condition in which only moderate mechanical or electrical stimulation produces spasms, convulsions, or tetany.
- special area — distressed area.
- special plea — a plea that alleges special or new matter as an answer to the allegations made by the opposite side and not as a denial of them.
- speed camera — device that detects speeding traffic
- spina bifida — a congenital neural tube defect in which part of the meninges or spinal cord protrudes through the spinal column, often resulting in neurological impairment.
- spotsylvania — a village in NE Virginia: the scene of Civil War battles between the armies of Grant and Lee, May 8–21, 1864.
- staging area — an area, as a port of embarkation, where troops are assembled and readied for transit to a new field of operations.
- stara zagora — a city in central Bulgaria.
- steatorrhoea — the presence of excess fat in the stools, usually caused by disease of the pancreas or intestine, and characterized by chronic diarrhea and weight loss.
- stereocamera — a stereoscopic camera.
- stichomythia — dramatic dialogue, as in a Greek play, characterized by brief exchanges between two characters, each of whom usually speaks in one line of verse during a scene of intense emotion or strong argumentation.
- sulfonylurea — any of a group of oral drugs, as tolbutamide, that stimulate the pancreas to secrete more insulin, used to treat diabetes
- sun umbrella — an umbrella by a chair or table, used for protecting you from the sun
- supermaxilla — the upper jaw.
- support area — a minimum price below which a specific stock is not supposed to fall, as because of the stock's inherent worth.
- surface area — the total area on the surface of a three-dimensional figure
- sursum corda — the words “Lift up your hearts,” addressed by the celebrant of the Mass to the congregation just before the preface.
- sutta pitaka — a collection of scriptures, originally recorded from oral traditions in the 1st century b.c., divided into one of three parts (Pitaka) sermons () the rules of the Buddhist order () and several treatises on philosophy and psychology ()
- swamp azalea — an azalea, Rhododendron viscosum, of the eastern U.S., having fragrant, white to pink or sometimes red flowers.
- synaesthesia — synesthesia.
- synarthrodia — synarthrosis.
- tachyphrasia — a communication disorder involving rapid, unintelligible speech
- taramasalata — a Greek dip or paste of smoked carp roe combined with milk, bread crumbs, lemon juice, and olive oil.
- te rauparaha — ?1768–1849, Māori warrior chief, head of the Ngāti Toa tribe and signatory to the Treaty of Waitangi; noted for his cunning and his prowess in battle, he is also credited with composing "Ka Mate", the All Blacks' usual pre-match haka
- technophilia — a person who loves or is enthusiastic about advanced technology.
- technophobia — abnormal fear of or anxiety about the effects of advanced technology.
- telaesthesia — telesthesia.
- teratophobia — fear of giving birth to a monster
- tetradrachma — a silver coin of ancient Greece, equal to four drachmas.
- tezcatlipoca — an Aztec god.
- thalassaemia — a hereditary disease, common in many parts of the world, resulting from defects in the synthesis of the red blood pigment haemoglobin
- the demerara — a river in Guyana, rising in the central forest area and flowing north to the Atlantic at Georgetown. Length: 346 km (215 miles)
- theatromania — an abnormal fondness or mania for the theatre
- thermalgesia — pain caused by heat.
- thessalonica — official name of Salonika.
- thiobacteria — bacteria found esp. in stagnant water and at the bottom of the sea, that oxidize or reduce sulfur compounds, as hydrogen sulfide
- tlalnepantla — a city in Mexico state, central Mexico: suburb of Mexico City.
- tonic sol-fa — a system of singing characterized by emphasis upon tonality or key relationship, in which tones are indicated by the initial letters of the syllables of the sol-fa system rather than by conventional staff notation.
- toxicophobia — an intense fear of poisoning
- tradescantia — any plant of the American genus Tradescantia, widely cultivated for their striped variegated leaves: family Commelinaceae
- transfer rna — a small RNA molecule, consisting of a strand of nucleotides folded into a clover-leaf shape, that picks up an unattached amino acid within the cell cytoplasm and conveys it to the ribosome for protein synthesis. Abbreviation: tRNA.
- transnistria — a region of E Moldova: unilaterally declared itself independent in 1990 and was the scene of fighting between government troops and separatists in 1992; to a large extent it functions as a separate republic, but without international recognition