1. ideologist an advocate of some ideology
  2. ideology an orientation that characterizes the thinking of a group
  3. idealist someone not guided by practical considerations
  4. ideal gas a hypothetical gas with molecules of negligible size that exert no intermolecular forces
  5. adelgid any of various insects that feed and form galls on conifers
  6. ethologist a zoologist who studies the behavior of animals in their natural habitats
  7. otologist a physician who specializes in the ear and its diseases
  8. etiologist a specialist in the etiology of diseases
  9. idiolect language of one individual at a particular period in life
  10. ideological relating to the characteristic thinking of a group
  11. ideologic concerned with or suggestive of ideas
  12. Adelgidae plant lice
  13. ideality the quality of being ideal
  14. idealogue someone who theorizes (especially in science or art)
  15. aetiologist a specialist in the etiology of diseases
  16. ideologue one who adheres strictly and inflexibly to some belief
  17. wedding gift a present given to someone getting married
  18. ideal solid any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent
  19. Adelie Coast a costal region of Antarctica to the south of Australia
  20. weightlift lift weights