Laughter can cause/lead to Happiness. Laughter is related to Happy. you would Sing because Happy. 
Fabric is related to Gain. Gain is related to Wealth. Wealth is the opposite of Poverty. Poverty is related to Poor. 
Happiness <--Causes-- Laughter <--RelatedTo--> Happy <--MotivatedByGoal-- Sing 
Fabric <--RelatedTo--> Gain <--RelatedTo--> Wealth <--Antonym--> Poverty <--RelatedTo--> Poor 