irreplaceable /ir-i-plāˈsə-bl/

1. Whose loss cannot be made good
2. Without possible substitute

• coloniser
• colonisers
• colonises
• colonising
• colonist
• colonists
• colonitis
• colonitises
• colonization
• colonize
• colonized
• colonizer
• colonizers
• colonizes
• colonizing
• colonnade
• colonnaded
• colonnades
• colonoscope
• colonoscopies
• colonoscopy
• colons
• colony
• colony collapse disorder
• colony stimulating factors