FUN

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Across
  1. 2. easily persuaded to believe something; credulous.
  2. 4. worthy of attention or notice; remarkable.
  3. 5. achieving maximum productivity with minimum wasted effort or expense.
  4. 8. treating serious issues with deliberately inappropriate humor; flippant.
  5. 9. clearly visible or understood; obvious
Down
  1. 1. inspiring fear or respect through being impressively large, powerful, intense, or capable.
  2. 3. of or according to the rules of logic or formal argument.
  3. 6. lacking restraint in spending money or using resources.
  4. 7. relaxed and unconcerned.