Nouns: disagreement, happiness, observation, relationship, ability

   Adjectives: harmful, attractive, helpless, behavioural, reliable

   Verbs: popularize

   

   1 demonstrative

   2 partnership

   3 moderniz(s)ed

   4 shyness

   5 confrontation

   6 eventful

   7 hopeless

   8 detestable

   9 continuity

   10 achievement

   11 financial