Lost is similar to Missing. Missing is related to Lose. Loss is etymologically related to Lose. 
Heel is a type of End. End is a synonym of Purpose. Purpose is a synonym of Determination. Determination is related to Focus. 
Lost <--SimilarTo--> Missing <--RelatedTo--> Lose <--EtymologicallyRelatedTo-- Loss 
Heel --IsA--> End <--Synonym--> Purpose <--Synonym--> Determination <--RelatedTo--> Focus 