unreplaceable
Cannot be substituted
Unreplaceable means impossible to replace—so unique or valuable that no substitute exists.
The word is interchangeable with irreplaceable, though irreplaceable is more common in formal writing: The unreplaceable photographs were lost in the fire.
Both forms convey the same meaning; unreplaceable simply uses the prefix un- instead of the Latinate ir-.
Having no equivalent
- singularOne in number
- inimitableImpossible to imitate
- distinctiveReadily identifiable, set apart
- matchlessHaving no equal
peerless · unparalleled · incomparable · unmatched · unequaled · original · irreproducible · nonpareil
One who is treasured
- treasuredRegarded with deep affection
- preciousHighly esteemed, greatly valued
- dearTreasured or costly
- pricelessToo valuable to quantify
sentimental · nostalgic · heirloom · keepsake · memento · heartfelt · meaningful · significant
Too valuable to quantify
- invaluableBeyond monetary worth
- preciousHighly esteemed, greatly valued
- costlyHigh in price
- rareSeldom found or seen
scarce · prized · coveted · sought-after · collectible · antique · vintage · treasure
one-of-a-kind
Having no equivalent
- singularOne in number
- inimitableImpossible to imitate
- distinctiveReadily identifiable, set apart
matchless · peerless · unparalleled · incomparable · unmatched · unequaled · original · irreproducible · nonpareil · sui generis
beloved
One who is treasured
priceless · sentimental · nostalgic · heirloom · keepsake · memento · heartfelt · meaningful · significant · personal
priceless
Too valuable to quantify
- invaluableBeyond monetary worth
- preciousHighly esteemed, greatly valued
- costlyHigh in price
rare · scarce · prized · coveted · sought-after · collectible · antique · vintage · treasure · gem
indispensable
Utterly required, irreplaceable
- vitalEssential or sustaining existence
- crucialOf supreme importance
- necessaryIndispensable, cannot omit
critical · key · pivotal · fundamental · integral · core · central · requisite · imperative · needed
unreplaceablereplaceable
Able to be exchanged
interchangeable · substitutable · exchangeable · swappable · fungible
unreplaceableexpendable
Able to be sacrificed
disposable · commonplace · ordinary · generic · dime-a-dozen
replace, replaced, replacement, misplaced, displace, replacing, misplace, displaced, displacement