nonreplaceable
One of kind
Nonreplaceable describes something that cannot be substituted or exchanged for another of its kind.
The term applies to items of unique value—nonreplaceable family heirlooms—or to resources that once depleted are gone forever: nonreplaceable fossil fuels.
Irreplaceable is the more common form.
Utterly required, irreplaceable
- essentialFundamentally necessary
- vitalEssential or sustaining existence
- criticalExpressing disapproval or importance
- invaluableBeyond monetary worth
integral · fundamental · necessary · pivotal · core · key · crucial · requisite
Too valuable to quantify
- invaluableBeyond monetary worth
- treasuredRegarded with deep affection
- cherishedHeld dear, prized
- heirloomInherited family treasure
irretrievable · sentimental · keepsake · artifact · relic · memento · antique · heritage
Having no equivalent
- singularOne in number
- unparalleledHaving no equivalent
- matchlessHaving no equal
- peerlessHaving no equal
incomparable · unmatched · unrepeatable · inimitable · distinctive · unprecedented · rare · exceptional
Persisting through time
- lastingContinuing through time
- immutableIncapable of being changed
- unchangeableImpossible to modify
- perpetualLasting without interruption
everlasting · constant · fixed · indelible · unalterable · irreversible · abiding · timeless
indispensable
Utterly required, irreplaceable
- essentialFundamentally necessary
- vitalEssential or sustaining existence
- criticalExpressing disapproval or importance
invaluable · integral · fundamental · necessary · pivotal · core · key · crucial · requisite · imperative
priceless
Too valuable to quantify
- invaluableBeyond monetary worth
- treasuredRegarded with deep affection
- cherishedHeld dear, prized
heirloom · irretrievable · sentimental · keepsake · artifact · relic · memento · antique · heritage · legacy
one-of-a-kind
Having no equivalent
- singularOne in number
- unparalleledHaving no equivalent
- matchlessHaving no equal
peerless · incomparable · unmatched · unrepeatable · inimitable · distinctive · unprecedented · rare · exceptional · sui generis
enduring
Persisting through time
- lastingContinuing through time
- immutableIncapable of being changed
- unchangeableImpossible to modify
perpetual · everlasting · constant · fixed · indelible · unalterable · irreversible · abiding · timeless · unremovable
nonreplaceablereplaceable
Able to be exchanged
interchangeable · substitutable · exchangeable · swappable · fungible
nonreplaceabledisposable
Made for one use
expendable · consumable · throwaway · single-use · renewable
nonreplaceabledisposable
Made for one use
expendable · common · ordinary · abundant · generic
replace, replaceable, replacement, replacements, replaces, replaced, replacing, replacer, irreplaceable