Defend is a synonym of Champion. Champion is a type of Rival. 
Factor is related to Condition. Condition is a synonym of Accident. Accident is related to Slip. Slip is related to Wet. 
Defend <--Synonym--> Champion --IsA--> Rival 
Factor <--RelatedTo--> Condition <--Synonym--> Accident <--RelatedTo--> Slip <--RelatedTo--> Wet 