Legend is a synonym of Hero. Hero is related to Story. Mystery is a type of Story. Mysterious is derived from Mystery. 
Interval is related to Range. Range is a synonym of Run. Run is a different concept from Walking. Walking is related to Limb. 
Legend <--Synonym--> Hero <--RelatedTo--> Story <--IsA-- Mystery <--DerivedFrom-- Mysterious 
Interval <--RelatedTo--> Range <--Synonym--> Run <--DistinctFrom--> Walking <--RelatedTo--> Limb 