CUB - A young fox.
CUE - An action or event that is a signal for somebody to do something.
CUT - Having been cut.
BUCK - A male deer, antelope, sheep, goat, rabbit, hare, and sometimes the male of other animals such as the ferret and shad.
CUBE - A regular polyhedron having six identical square faces.
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.
BECK - A stream or small river.
TUCK - To fit neatly.
BUCKET - A container made of rigid material, often with a handle, used to carry liquids or small items.