Loose is related to Find. Find is a synonym of Happen. Happen is related to Force. 
Expertise is related to Skill. Skill is the opposite of Chance. Chance is related to Choice. 
Loose <--RelatedTo--> Find <--Synonym--> Happen <--RelatedTo--> Force 
Expertise <--RelatedTo--> Skill <--Antonym--> Chance <--RelatedTo--> Choice 