12-letter words containing f, l, s, a
- sulfate pulp — wood pulp made by the sulfate process.
- sulfonylurea — any of a group of oral drugs, as tolbutamide, that stimulate the pancreas to secrete more insulin, used to treat diabetes
- superfrontal — a piece of cloth placed over an altar and frontal and hanging down a few inches over the front of the altar
- surface mail — the system, especially a government postal system, of sending mail by truck, train, or boat, as opposed to airmail.
- synchroflash — of or relating to photography employing a device that synchronizes the photoflash with the shutter.
- telesoftware — the transmission of computer programs on a teletext system
- thankfulness — feeling or expressing gratitude; appreciative.
- thousandfold — having a thousand elements or parts.
- thrust fault — a low-angle reverse fault produced in rocks subjected to thrust.
- thunderflash — a pyrotechnic device which is noisy, but not dangerous, and which is used in military exercises
- to hold fast — If you hold something fast, you hold it tightly and firmly. If something is stuck fast, it is stuck very firmly and cannot move.
- to lose face — If you lose face, you do something which makes you appear weak and makes people respect or admire you less. If you do something in order to save face, you do it in order to avoid appearing weak and losing people's respect or admiration.
- to play safe — If you play safe or play it safe, you do not take any risks.
- 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.
- trace fossil — a fossilized track, trail, burrow, boring, or other structure in sedimentary rock that records the presence or behavior of the organism that made it.
- trans female — a person who was born male but whose gender identity is female.
- transferable — to convey or remove from one place, person, etc., to another: He transferred the package from one hand to the other.
- treble staff — a staff, bearing a treble clef.
- ultraleftist — ultraleft.
- unclassified — not assigned to a class or category; not arranged according to characteristics: Reported instances fall into two main types, with a few unclassified anomalies.
- unsufferable — insufferable; intolerable
- vacuum flask — A vacuum flask is a container which is used to keep hot drinks hot or cold drinks cold. It has two thin silvery glass walls with a vacuum between them.
- visual field — field of vision.
- walking fish — any of various fishes able to survive and move about for short periods of time on land, as the mudskipper or climbing perch.
- wastefulness — given to or characterized by useless consumption or expenditure: wasteful methods; a wasteful way of life.
- watchfulness — vigilant or alert; closely observant: The sentry remained watchful throughout the night.
- well-staffed — a group of persons, as employees, charged with carrying out the work of an establishment or executing some undertaking.
- wineglassful — the capacity of a wineglass, typically containing four to six fluid ounces.
- world's fair — a large international exposition with exhibitions of arts, crafts, industrial and agricultural products, scientific achievements, etc.
- world-famous — famous throughout the world: a world-famous film.
- worst of all — You say worst of all to indicate that what you are about to mention is the most unpleasant or has the most disadvantages out of all the things you are mentioning.
- wrathfulness — The quality of being wrathful; wrath.
- zinc sulfate — a colorless, crystalline, water-soluble powder, ZnSO 4 ⋅7H 2 O, used for preserving skins and wood, in the electrodeposition of zinc, in the bleaching of paper, as a mordant in calico printing, and in medicine as an astringent, styptic, and emetic.