Vocabulary 1.spec specialization the process of concentrating on and becoming expert in a particular subject or skill. 2.homo homogeneity the quality or state of being all the same or all of the same kind. 3.fer fertilize make (soil or land) more fertile or productive by adding suitable substances to it. 4.duct or duc ductwork a system or network of ducts. 5.pend pendulum used to refer to the tendency of a situation to oscillate between one extreme and another.