Foot is related to Heal. Music can Heal. Music would make you want to Listen. 
Magnitude is related to Quantity. Constant is a type of Quantity. Constant is the opposite of Variable. Variable is a synonym of Flexible. 
Foot <--RelatedTo--> Heal <--CapableOf-- Music --CausesDesire--> Listen 
Magnitude <--RelatedTo--> Quantity <--IsA-- Constant <--Antonym--> Variable <--Synonym--> Flexible 