1. Impossible to replace
   - irreplaceable

See also: unexpendable

• be intimate
• be my guest
• be off
• be on
• be on cloud nine
• be on the ball
• be quiet
• be sick
• be well
• be with it
• be-all and end-all
• beach
• beach aster
• beach buggy
• beach chair
• beach erosion
• beach flea
• beach goldenrod
• beach grass
• beach heather
• beach house
• beach morning glory
• beach pancake
• beach pea
• beach plum