13-letter words containing s, i, t, r
- antiterrorist — relating to measures, policies, or organizations designed to combat terrorist activity
- aphanipterous — of or relating to the wingless insects of the order Aphaniptera
- apocryphalist — A member of the group who supported the inclusion of the Apocrypha in the Bible.
- apogeotropism — negative geotropism, as shown by plant stems
- apostrophized — Simple past tense and past participle of apostrophize.
- apostrophizes — Third-person singular simple present indicative form of apostrophize.
- apperceptions — Plural form of apperception.
- appersonation — the unconscious assumption of the personality characteristics of another, usually well known, person.
- appoggiaturas — Plural form of appoggiatura.
- appreciations — Plural form of appreciation.
- appropriators — Plural form of appropriator.
- apron strings — If you say that someone is tied to another person's apron strings, you mean that they are controlled or influenced too much by the other person.
- aquaculturist — a person who practises aquaculture
- arachnoiditis — an inflammation of the arachnoid membrane
- arbitrariness — subject to individual will or judgment without restriction; contingent solely upon one's discretion: an arbitrary decision.
- archaeologist — a specialist in archaeology, the scientific study of prehistoric peoples and their cultures by analysis of their artifacts, inscriptions, monuments, etc.
- archeologists — archaeology.
- architectures — Plural form of architecture.
- arcticologist — a person who specializes in arcticology.
- argentiferous — containing or bearing silver
- aristocracies — Plural form of aristocracy.
- aristocratism — the principles of aristocrats
- aristolochene — (organic compound) A bicyclic sesquiterpene produced by certain fungi.
- arkansas city — a city in S Kansas.
- arm wrestling — a contest in which two people sit facing each other each with one elbow resting on a table, clasp hands, and each tries to force the other's arm flat onto the table while keeping his own elbow touching the table
- armistice day — the anniversary of the signing of the armistice that ended World War I, on Nov 11, 1918, now kept on Remembrance Sunday
- armstand dive — a dive starting from a handstand at the end of a springboard or a platform with the diver's back to the water.
- arseniuretted — combined with arsenic so as to form an arsenide.
- artaxerxes ii — died ?358 bc, king of Persia (?404–?358). He defeated his brother Cyrus the Younger at Cunaxa (401)
- arteriovenous — of, relating to, or affecting an artery and a vein
- artesian well — well sunk through impermeable strata receiving water from an area at a higher altitude than that of the well
- arthroscopies — Plural form of arthroscopy.
- articulations — Plural form of articulation.
- ascertainable — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- ascertainably — In a way that can be ascertained.
- ascertainment — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- aspartic acid — nonessential amino acid that is a component of proteins and acts as a neurotransmitter
- aspirationals — Plural form of aspirational.
- assassinators — Plural form of assassinator.
- assault rifle — a firearm that is capable of firing multiple rounds in a very short period
- assertability — The quality of being assertable.
- assertiveness — confidently aggressive or self-assured; positive: aggressive; dogmatic: He is too assertive as a salesman.
- assortatively — In an assortative way.
- assortativity — (mathematics) The extent to which nodes of a graph link to others of the same degree.
- assyriologist — A person who studies ancient Assyria.
- astereognosis — inability to recognize objects by touch
- asteroid belt — the concentrations of asteroids that move around the sun mainly between the orbits of Mars and Jupiter
- astrodynamics — the study of the motion of natural and artificial bodies in space
- astronautical — of or relating to astronautics or astronauts.
- astroparticle — (astrophysics) A subatomic particle of cosmic origin.