1.
-ion- describtion, interaction, invention
-ity- personality, similarity, sincerity
-er- researcher, speaker
-cy- acuracy, frequentcy
-ness- happiness, loneliness
-ist- psychologist, scientist
-ment- arguement, movement
2.
1. Acuracy
2. Friendship
3. Failure/ Failing
4. freedom
5. Safety
6. lonely
3.
a) expressions
b) indicative
c) Psychologists
d) participations
e) interaction
f) researchers
g) confidence
h) happiness
i) motivation
6.
-ant- ignorant, pleasant, tolerant, vibrant
-ent- appearent, confident, dependent, innocent, insistent, obedient, resistent
