PEP - To inject with energy and enthusiasm.
PER - For each.
PET - An animal kept as a companion.
POP - A loud, sharp sound as of a cork coming out of a bottle.
POT - A vessel used for cooking or storing food.
PRO - An advantage of something, especially when contrasted with its disadvantages (cons).
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.
OPT - To choose; to select.
POET - A person who writes poems.
POPE - The bishop of Rome; the head of the Roman Catholic church.
PORT - A place on the coast at which ships can shelter, or dock to load and unload cargo or passengers.
PREP - Preparation.
ROPE - Thick strings, yarn, monofilaments, metal wires, or strands of other cordage that are twisted together to form a stronger line.
PROP - An object placed against or under another, to support it; anything that supports.
PORE - A tiny opening in the skin.
PERT - To behave with pertness.
REPO - Repossession.
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.
TOPPER - Something that is on top.