Word Unit: Oaf of Office (Old Norse: oaf, silly person)
Word Unit: Ocean and Deep Sea Terms (the study of the deep seas or oceans involves the abyss or the "deep seas" which cover almost two-thirds of the earth's surface; showing applicable scientific terminology in this unit)
Word Unit: Old Age (the challenges that face people in their later years)
Word Unit: Old Age, Get Ready for It (A few clips from Old Age Is Not for Sissies by Art Linkletter)