Thanks is the opposite of Please. Please is related to Listen. Listen is the opposite of Say. 
Islam is a type of Religion. Religion is related to Organization. Organization is related to Neat. Neat is related to Serving. 
Thanks <--Antonym--> Please <--RelatedTo--> Listen <--Antonym--> Say 
Islam --IsA--> Religion <--RelatedTo--> Organization <--RelatedTo--> Neat <--RelatedTo--> Serving 