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What is the noun form
What is the adjective form
Adjective opposites
100
Introduce
Introduction
100
help
helpful
100
modern
polite
200
Improve
Improvement
200
Fame
Famous
200
polite
impoliteW
300
Instruct
Instruction
300
Mystery
Mysterious
300
familiar
unfamiliar
400
available
availability
400
Practice
Practical
400
encourage
discourage
500
familiar
familiarity
500
co-operate
co-operative
500
optimistic
pessimistic