Cotton is related to Grow. Grow is related to Change. Scramble is a type of Change. Scramble is a type of Struggle. 
Ground is related to Round. Round is related to Curve. 
Cotton <--RelatedTo--> Grow <--RelatedTo--> Change <--IsA-- Scramble --IsA--> Struggle 
Ground <--RelatedTo--> Round <--RelatedTo--> Curve 