Swell is a type of Expand. Expand is the opposite of Contract. Contract is related to Business. Franchise is a type of Business. 
Speculation is a type of Investment. Stock is a type of Investment. Stock is a type of Flower. Flower is related to Hand. 
Swell --IsA--> Expand <--Antonym--> Contract <--RelatedTo--> Business <--IsA-- Franchise 
Speculation --IsA--> Investment <--IsA-- Stock --IsA--> Flower <--RelatedTo--> Hand 