Words with unstressed vowels - schwa sound!

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Across
  1. 3. A group or class of things having common characteristics. (8 letters)
  2. 4. To be in a state of hopelessness or need. (9 letters)
  3. 6. A book that provides definitions and meanings of words. (10 letters)
  4. 7. A place where people are buried. (8 letters)
  5. 8. To observe or commemorate something, especially an event. (9 letters)
  6. 9. Distinct from others. (10 letters)
Down
  1. 1. A type of plant or food that is often included in a healthy diet. (10 letters)
  2. 2. A word used for something preferred or liked best. (9 letters)
  3. 4. Something that is certain and clear. (8 letters)
  4. 5. To provide enough space or make room for something. (11 letters)