Boost is related to Raise. Raise is related to Reward. Reward is related to Thanks. Thanks is related to Welcome. 
Rear is related to Hide. Hide is the opposite of Disclose. 
Boost <--RelatedTo--> Raise <--RelatedTo--> Reward <--RelatedTo--> Thanks <--RelatedTo--> Welcome 
Rear <--RelatedTo--> Hide <--Antonym--> Disclose 