1. -ment: development, excitement, achievement2. -ation: education, destination, communication3. -ing: learning, teaching, cooking4. -able/-ible: acceptable, flexible, visible5. -ive: creative, positive, active6. -ness: happiness, kindness, darkness7. -ly: quickly, softly, completely8. -ful: playful, helpful, careful9. -less: meaningless, hopeless, fearless10. -ize/-ise: organize, realize, criticize.