Sail is related to Action. Action is related to Swallow. Swallow is a synonym of Accept. 
Relax is the opposite of Work. Check is a type of Work. Check is related to Payment. Payment is related to Loan. 
Sail <--RelatedTo--> Action <--RelatedTo--> Swallow <--Synonym--> Accept 
Relax <--Antonym--> Work <--IsA-- Check <--RelatedTo--> Payment <--RelatedTo--> Loan 