Struggle is a synonym of Conflict. Conflict is a synonym of Action. Action is related to Gather. Gather is the opposite of Scatter. 
Voice is related to Echo. Echo is a type of Award. Pension is a type of Award. 
Struggle <--Synonym--> Conflict <--Synonym--> Action <--RelatedTo--> Gather <--Antonym--> Scatter 
Voice <--RelatedTo--> Echo --IsA--> Award <--IsA-- Pension 