1. arbitrary based on or subject to individual discretion or preference
  2. aerobatics the performance of stunts while in flight in an aircraft
  3. propitious presenting favorable circumstances
  4. arbutus any of several evergreen shrubs of the genus Arbutus of temperate Europe and America
  5. perpetual continuing forever or indefinitely
  6. Euripides one of the greatest tragic dramatists of ancient Greece
  7. whereabouts the general location of someone or something
  8. eruptive producing or characterized by eruptions
  9. Peripatopsis type genus of Peripatopsidae
  10. Arabidopsis a genus of the mustard family having white or yellow or purplish flowers; closely related to genus Arabis
  11. Oreopteris 3 species of ferns formerly included in genus Dryopteris or Thelypteris
  12. peripatus any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms
  13. reputable held in high esteem and honor
  14. Peripatopsidae a family of Onychophora
  15. aerobics exercise that increases the need for oxygen
  16. robotics the area of AI concerned with the practical use of robots
  17. repetition the act of doing or performing again
  18. Erb's palsy paralysis of the arm resulting from injury to the brachial plexus (usually during childbirth)
  19. carpet pad a pad placed under a carpet
  20. Rypticus a genus of fish of the family Serranidae, including soapfishes