Mortgage is related to Rate. Rate is related to Prime. Prime is related to Charge. 
Process is related to Freeze. Freeze is a type of Change. Touch is a type of Change. Touch is a synonym of Stir. 
Mortgage <--RelatedTo--> Rate <--RelatedTo--> Prime <--RelatedTo--> Charge 
Process <--RelatedTo--> Freeze --IsA--> Change <--IsA-- Touch <--Synonym--> Stir 