Cover is the opposite of Leave. Leave is related to Motion. 
Tomato is related to Round. Round is related to Like. Like is related to Enemy. Enemy is related to Threat. 
Cover <--Antonym--> Leave <--RelatedTo--> Motion 
Tomato <--RelatedTo--> Round <--RelatedTo--> Like <--RelatedTo--> Enemy <--RelatedTo--> Threat 