Ask is the opposite of Command. Command is related to Control. Control is related to Charge. 
Busy is the opposite of Rest. Rest is a synonym of Place. Place is related to Base. Base is related to Camp. 
Ask <--Antonym--> Command <--RelatedTo--> Control <--RelatedTo--> Charge 
Busy <--Antonym--> Rest <--Synonym--> Place <--RelatedTo--> Base <--RelatedTo--> Camp 