Gain is a synonym of Accept. Accept is a synonym of Regard. Regard is a synonym of Suppose. Supposed is a form of Suppose. 
Policeman is related to Uniform. Uniform is related to Guard. Guard is related to Jail. 
Gain <--Synonym--> Accept <--Synonym--> Regard <--Synonym--> Suppose <--FormOf-- Supposed 
Policeman <--RelatedTo--> Uniform <--RelatedTo--> Guard <--RelatedTo--> Jail 