hard rubber: a hard nonresilient rubber formed by vulcanizing natural rubber
rubber: an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products
landlord's lien: lien on a tenant's property for the satisfaction of unpaid rent or property damage; the landlord is given the status of a preferred creditor with regard to the tenant's property