Muscle can Contract. Contract is the opposite of Expand. Expand is the opposite of Crop. Crop is related to Tobacco. 
Adventure is related to Tour. Tourism is derived from Tour. 
Muscle --CapableOf--> Contract <--Antonym--> Expand <--Antonym--> Crop <--RelatedTo--> Tobacco 
Adventure <--RelatedTo--> Tour <--DerivedFrom-- Tourism 