ORE - Rock that contains utilitarian materials; primarily a rock containing metals or gems which (at the time of the rock's evaluation and proposal for extraction) are able to be separated from its neighboring minerals and processed at a cost that does not exceed those materials' present-day economic values.
PER - For each.
PET - An animal kept as a companion.
POT - A vessel used for cooking or storing food.
ROT - To suffer decomposition due to biological action, especially by fungi or bacteria.
TOE - Each of the five digits on the end of the foot.
TOP - That part of an object furthest away in the opposite direction from that in which an unsupported object would fall.
OPT - To choose; to select.
REP - Short form of reputation.
POX - A disease characterized by purulent skin eruptions that may leave pockmarks.
POET - A person who writes poems.
PORT - A place on the coast at which ships can shelter, or dock to load and unload cargo or passengers.
TORE - Hard, difficult; wearisome, tedious.
ROTE - The process of learning or committing something to memory through mechanical repetition, usually by hearing and repeating aloud, often without full attention to comprehension or thought for the meaning.
PERT - To behave with pertness.
EXPO - An exposition.
TROPE - Something recurring across a genre or type of literature, such as the 'mad scientist' of horror movies or 'once upon a time' as an introduction to fairy tales. Similar to archetype and cliché but not necessarily pejorative.
EXPORT - Of or relating to exportation or exports.