A natural or artificial egg placed in a bird's nest, to encourage the bird to lay its own eggs there. / (figuratively) A saving; a reserve of money. / An egg squash.

(nautical) A small open-top shelter, originally a cask, on the top of the foremast, large enough to accommodate a lookout. It was used by whalers to watch for a blow (spout), or in icebound waters to seek a channel.

The area of a beehive where the young are reared

A large nest built and occupied by several pairs of birds together.

(zoology, ichthyology) A shallow depression made in the gravel bed of a water body in which fish lay eggs.

(literally) A hornets' nest. / (figuratively) An unpleasant or controversial situation likely to be exacerbated by outside involvement.

plural of nest scrape

plural of nest egg

(US, archaic, informal, idiomatic) A state of chaos and confusion.

A structure built by a bird as a place to incubate eggs and rear young. / Any of several plants having some resemblance to the typical nest of a bird, eg, wild carrot (Dauca carota)