Punctilious
Very exacting, meticulous, scrupulous.
Pungent
Biting, keen, acerbic, mordant.
Purge
Cleanse.
Pusillanimous
Cowardly, craven, feckless.
Putrid
Rotting.
Qualm
Scruple, misgiving, conscience, pang.
Quandary
Predicament, dilemma.
Quash
Suppress, quell, nullify, abrogate.
Quay
Pier.
Quell
Subdue, quash.
Querulous
Constantly complaining, quarrelsome, captious.
Quiescence
Quiet, tranquility, serenity.
Quintessence
The most perfect state of an essence.
Quixotic
Impractical, fanciful, chimerical.
Raconteur
Storyteller of anecdotes.