Nook and cranny are terms used to describe the smallest, most hidden spaces of a room or building. They're typically difficult to find, making them perfect hiding spots for insects, rodents, and other pests. Synonyms for nook and cranny include crevice, cranny, crack, fissure, orifice, aperture, hole, hiding place, cubbyhole, recess, and alcove. These words are used interchangeably with nook and cranny, and they all refer to tight, enclosed spaces. Although these words share the same meaning as nook and cranny, each one has its own connotation, such as a crevice is usually narrow and deep, while a cubbyhole may be larger and more convenient.