Search Result for "unreplaceable": 
Wordnet 3.0

ADJECTIVE (1)

1. impossible to replace;
- Example: "irreplaceable antiques"
[syn: irreplaceable, unreplaceable]



WordNet (r) 3.0 (2006):

unreplaceable
    adj 1: impossible to replace; "irreplaceable antiques" [syn:
           irreplaceable, unreplaceable] [ant: replaceable]