Home is the opposite of Game. Game is related to Competition. Competition is a synonym of Rival. 
Timber is a type of Post. Timber is related to Building. Building is related to Keep. Keep is related to Include. 
Home <--Antonym--> Game <--RelatedTo--> Competition <--Synonym--> Rival 
Post <--IsA-- Timber <--RelatedTo--> Building <--RelatedTo--> Keep <--RelatedTo--> Include 