9-letter words containing t, a, s, i
- adventism — the belief that the Second Coming of Christ will occur soon
- adventist — a member of any of the Christian groups, such as the Seventh-Day Adventists that hold that the Second Coming of Christ is imminent
- adversity — an unfortunate event or incident
- advertise — If someone or something advertises a particular quality, they show it in their appearance or behaviour.
- aegisthus — a cousin to and the murderer of Agamemnon, whose wife Clytemnestra he had seduced. He usurped the kingship of Mycenae until Orestes, Agamemnon's son, returned home and killed him
- aerialist — a trapeze artist or tightrope walker
- aerolites — Plural form of aerolite.
- aerotaxis — the movement of organisms towards or away from oxygen caused by changes in oxygen concentration
- aesthesia — the normal ability to experience sensation, perception, or sensitivity
- aesthesis — sensation; feeling.
- aesthetic — Aesthetic is used to talk about beauty or art, and people's appreciation of beautiful things.
- aestivate — to pass the summer
- affirmest — (archaic) Archaic second-person singular form of affirm.
- afterings — the last of the milk drawn from a cow in milking, which contains the richest milk
- agelastic — never laughing; mirthless
- agilities — the power of moving quickly and easily; nimbleness: exercises demanding agility.
- agistment — the act of agisting
- agitators — a person who stirs up others in order to upset the status quo and further a political, social, or other cause: The boss said he would fire any union agitators.
- agnostics — Plural form of agnostic.
- agonistes — a person enduring an inner struggle
- agonistic — striving for effect; strained
- agrestial — inhabiting a rural area
- agustin i — Itúrbide, Agustín de.
- ahistoric — not related to or concerned with documented history
- ahtisaari — Martti [mahr-ti] /ˈmɑr tɪ/ (Show IPA), born 1938, president of Finland 1994–2000.
- aids test — a blood test that detects whether the blood sample contains antibodies to the human immunodeficiency virus (HIV) and thus whether a person has or is likely to develop AIDS
- aigrettes — Plural form of aigrette.
- ailanthus — an E Asian simaroubaceous deciduous tree, Ailanthus altissima, planted in Europe and North America, having pinnate leaves, small greenish flowers, and winged fruits
- air blast — a jet of air produced mechanically.
- air frost — the deposition of ice condensed from water vapour in the atmosphere on the surface when the air temperature is below 0°C
- air hoist — a pneumatic hoist.
- air scout — a scout belonging to a scout troop that specializes in flying, gliding, etc
- air shaft — a shaft for ventilation, esp in a mine or tunnel
- air stack — stack (def 13).
- air twist — a serpentine motif within the stem of a goblet, produced by extending and twisting an air bubble during glass blowing.
- airbursts — Plural form of airburst.
- aircrafts — (nonstandard) Plural form of aircraft.
- airstream — a wind, esp at a high altitude
- airstrike — a military attack involving aircraft
- airstrips — Plural form of airstrip.
- akathisia — the inability to sit still because of uncontrollable movement caused by reaction to drugs
- akathisic — Relating to, or exhibiting, akathisia.
- alarmists — Plural form of alarmist.
- alchemist — An alchemist was a scientist in the Middle Ages who tried to discover how to change ordinary metals into gold.
- alchymist — Alternative spelling of alchemist.
- alginates — Plural form of alginate.
- alienates — Third-person singular simple present indicative form of alienate.
- alienists — Plural form of alienist.
- allantois — a membranous sac growing out of the ventral surface of the hind gut of embryonic reptiles, birds, and mammals. It combines with the chorion to form the mammalian placenta
- allergist — An allergist is a doctor who specializes in treating people with allergies.