Week 13

  1. underweight
  2. undernourished
  3. premature
  4. prehistoric
  5. preferred
  6. precaution
  7. postwar
  8. postgraduate
  9. overpopulated
  10. overbearing

 Challenge Words

  1. overemphasize
  2. overoptimistic
  3. oversimplification
  4. posthumous
  5. postmeridian
  6. postponement
  7. premeditated
  8. premonition
  9. preponderant
  10. underachiever
 Week 14
  1. admissible
  2. audible
  3. combustible
  4. credible
  5. edible
  6. flexible
  7. legible
  8. responsible
  9. sensible
  10. visible

Challenge Words

  1. deductible
  2. defensible
  3. divisible
  4. feasible
  5. ineligible
  6. inflexible
  7. intelligible
  8. permissible
  9. plausible
  10. tangible
 Week 15
  1. criteria
  2. criterion
  3. radii/radiuses
  4. scarf
  5. scarves or scarfs
  6. scissors
  7. shelf
  8. shelves
  9. volcano
  10. volcanoes

Challenge Words

  1. domino
  2. dominoes
  3. embryo
  4. embryos
  5. lice
  6. louse
  7. soprano
  8. sopranos
  9. specie
  10. species

Week 16

  1. concentration

  2. definition

  3. depression

  4. digestion

  5. indentation

  6. introduction

  7. invasion

  8. oppression

  9. provision

  10. vaccination

 Challenge Words

  1. contribution

  2. denotation

  3. dimension

  4. generalization

  5. personification

  6. precision

  7. progression

  8. recession

  9. reputation

  10. occasion

Week 17

  1. censor
  2. chili
  3. chilly
  4. counsel
  5. course
  6. isle
  7. meddle
  8. mourning
  9. patients
  10. wring

 Challenge Words

  1. bazaar
  2. bizarre
  3. discreet
  4. discrete
  5. incite
  6. insight
  7. marshal
  8. martial
  9. stationary
  10. stationery

 

 Week 18
  1. answered
  2. canoeing
  3. delaying
  4. exercising
  5. including
  6. interfered
  7. occurred
  8. omitted
  9. remembering
  10. satisfied

Challenge Words

  1. admitting
  2. differed
  3. discovered
  4. excelled
  5. excelling
  6. obliged
  7. obtaining
  8. overlapped
  9. patrolled
  10. trimmed