Fighter is derived from Fight. Fighter is related to Warrior. Warrior is related to Old. Old is related to Used. 
Worth is related to Equity. Equity is related to Improvement. Recovery is a type of Improvement. 
Fight <--DerivedFrom-- Fighter <--RelatedTo--> Warrior <--RelatedTo--> Old <--RelatedTo--> Used 
Worth <--RelatedTo--> Equity <--RelatedTo--> Improvement <--IsA-- Recovery 