1. ambiguity unclearness by virtue of having more than one meaning
  2. serum hepatitis an acute (sometimes fatal) form of viral hepatitis caused by a DNA virus that tends to persist in the blood serum and is transmitted by sexual contact or by transfusion or by ingestion of contaminated blood or other bodily fluids
  3. impact the striking of one body against another
  4. rampageous displaying raging violence; often destructive
  5. Aramus pictus wading bird of Florida, Cuba and Jamaica having a drooping bill and a distinctive wailing call
  6. rambunctious noisy and lacking in restraint or discipline
  7. army corps an army unit usually consisting of two or more divisions and their support
  8. aeromechanics the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow
  9. Areopagite a member of the council of the Areopagus
  10. aromatize fill or impregnate with an odor
  11. armistice a state of peace agreed to between opponents
  12. aromatise fill or impregnate with an odor
  13. thrombocytosis increase in the number of platelets in the blood which tends to cause clots to form; associated with many neoplasms and chronic infections and other diseases
  14. audio compact disc compact discs used to reproduce sound (voice and music)
  15. Armageddon (New Testament) the scene of the final battle between the kings of the Earth at the end of the world
  16. thrombectomy surgical removal of a blood clot from a blood vessel
  17. compactness the consistency of a compact solid
  18. air mattress a mattress that can be stored flat and inflated for use
  19. trumped-up concocted with intent to deceive
  20. prompt according to schedule or without delay