1. articulate express or state clearly
  2. artisan a skilled worker who practices some trade or handicraft
  3. iridescent varying in color when seen in different lights
  4. reticent reluctant to draw attention to yourself
  5. artesian relating to water that rises due to natural pressure
  6. arsenate a salt or ester of arsenic acid
  7. artesian well a well drilled through impermeable strata into strata that receive water from a higher altitude so there is pressure to force the water to flow upward
  8. artist person whose creative work shows sensitivity and imagination
  9. artiste a public performer (a dancer or singer)
  10. ratiocinate reason methodologically and logically
  11. incessant uninterrupted in time and indefinitely long continuing
  12. partisan a fervent and even militant proponent of something
  13. Arbutus unedo small evergreen European shrubby tree bearing many-seeded scarlet berries that are edible but bland; of Ireland, southern Europe, Asia Minor
  14. ordinate the value of a coordinate on the vertical axis
  15. artefact a man-made object taken as a whole
  16. earthnut a common European plant having edible tubers with the flavor of roasted chestnuts
  17. indecent not in keeping with accepted standards of polite society
  18. isothiocyanate a family of compounds derived from horseradish and radishes and onions and mustards; source of the hotness of those plants and preparations
  19. earth science any of the sciences that deal with the earth or its parts
  20. word salad jumble of incoherent speech as sometimes heard in schizophrenia