Worth is related to Value. Valuable is derived from Value. Valuable is related to Mine. Mine is related to Time. 
House is related to Rent. Rent is a different concept from Mortgage. Mortgage is related to Prime. 
Worth <--RelatedTo--> Value <--DerivedFrom-- Valuable <--RelatedTo--> Mine <--RelatedTo--> Time 
House <--RelatedTo--> Rent <--DistinctFrom--> Mortgage <--RelatedTo--> Prime 