CUE - An action or event that is a signal for somebody to do something.
CUT - Having been cut.
LET - To allow to, not to prevent (+ infinitive, but usually without to).
RUT - Sexual desire or oestrus of cattle, and various other mammals.
RUE - Repentance, regret.
CUR - A mongrel or inferior dog.
CLUE - A strand of yarn etc. as used to guide one through a labyrinth; something which points the way, a guide.
CULT - A group of people with a religious, philosophical or cultural identity sometimes viewed as a sect, often existing on the margins of society or exploitative towards its members.
CURL - A piece or lock of curling hair; a ringlet.
CUTE - Possessing physical features, behaviors, personality traits or other properties that are mainly attributed to infants and small or cuddly animals; e.g. fair, dainty, round, and soft physical features, disproportionately large eyes and head, playfulness, fragility, helplessness, curiosity or shyness, innocence, affectionate behavior.
LURE - Something that tempts or attracts, especially one with a promise of reward or pleasure.
RULE - A regulation, law, guideline.
TRUE - Conforming to the actual state of reality or fact; factually correct.
CURT - Brief or terse, especially to the point of being rude.
LUTE - A fretted stringed instrument, similar to a guitar, having a bowl-shaped body or soundbox.
CUTER - Comparative form of cute: more cute.
TRUCE - A period of time in which no fighting takes place due to an agreement between the opposed parties.
ULCER - An open sore of the skin, eyes or mucous membrane, often caused by an initial abrasion and generally maintained by an inflammation and/or an infection.
CRUEL - Not nice; mean; heartless.
CULTURE - The arts, customs, and habits that characterize a particular society or nation.