Space is the opposite of Outer. Outer is related to Rim. Rim is a synonym of Skirt. Skirt is a synonym of Surround. 
Voice is related to Function. Function is a synonym of Routine. 
Space <--Antonym--> Outer <--RelatedTo--> Rim <--Synonym--> Skirt <--Synonym--> Surround 
Voice <--RelatedTo--> Function <--Synonym--> Routine 