Thick is a synonym of Cord. Cord is a type of Fabric. Fabric can be Smooth. Smooth is related to Gentle. 
Pray is related to Church. Church can be used for Sing. Song would make you want to Sing. 
Thick <--Synonym--> Cord --IsA--> Fabric --HasProperty--> Smooth <--RelatedTo--> Gentle 
Pray <--RelatedTo--> Church --UsedFor--> Sing <--CausesDesire-- Song 