nests

• bases
• breeding grounds
• centers
• hideouts
• hotbeds
• hothouses
• lairs
• nidi
• niduses
• nurseries
• seedbeds
• seminaries

• noun
  1. A structure built by a bird as a place to incubate eggs and rear young.
  2. A place used by another mammal, fish, amphibian or insect, for depositing eggs and hatching young.
  3. A snug, comfortable, or cosy residence or job situation.
  4. A retreat, or place of habitual resort.
  5. A hideout for bad people to frequent or haunt; a den.
  6. A home that a child or young adult shares with a parent or guardian.
  7. A fixed number of cards in some bidding games awarded to the highest bidder allowing him to exchange any or all with cards in his hand.
  8. A fortified position for a weapon.
  9. A structure consisting of nested structures, such as nested loops or nested subroutine calls.
  10. A circular bed of pasta, rice, etc. to be topped or filled with other foods.
  11. An aggregated mass of any ore or mineral, in an isolated state, within a rock.
  12. A collection of boxes, cases, or the like, of graduated size, each put within the one next larger.
  13. A compact group of pulleys, gears, springs, etc., working together or collectively.
• verb
  1. (of animals) To build or settle into a nest.
  2. To settle into a home.
  3. To successively neatly fit inside another.
  4. To place in, or as if in, a nest.
  5. To place one thing neatly inside another, and both inside yet another (and so on).
  6. To hunt for birds' nests or their contents (usually "go nesting").

• The tree was filled with bird nests, carefully built among the branches.
• He watched as the sparrows gathered twigs to construct their nests.
• The abandoned nests showed signs of having been used in previous seasons.
• Some species of birds build their nests on rocky cliffs to protect their young.
• The park ranger advised visitors not to disturb the wildlife, especially the nests.

lairs

• beds
• burrows
• couches
• dens
• hideaway
• hideouts
• houses
• nests

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