isolated
nonrecurring
one-shot
once
yance
oncet
one-off
just a sec
hapax legomenon
once-in-a-lifetime
monotemporal
barely
scarce
uniradiate
just
scarcely
hardly
only
uniradiated
only if
only when
minute
unoccasional
tick
intraday
go-round
semioccasional
semioccasionally
monocausal
in one case
fixed-term
one time
twice
micromomentary
nonconsecutive
infrequently
outright
twicet
sporadical
preoccurrence
uninstantiated
bidaily
transient
unijugate
opportunity seldom knocks twice
unilamellate
semelparous
right away
anomalism
nonoccurrence
I can't remember the last time
nonce
for once
promptly
rehash
concurrence
nonrepeated
aborted
bad things come in threes
unsuccessive
uncommonly
once or twice
unreminded
doubt
wee
subchronic
ever
one-time
once in a blue moon
in two jumps
quondam
as it happens
microrepeat
coincidentally
incoincident
in no time
contemporaneous
nontimed
repeat
unifoliolate
unoccasioned
untimed
unapertured
every once in a while
although
straightway
just now
nonapertured
contemporary
rareish
recur
semirare
rare as a four-leaf clover

English words for 'occurring only once.'

As you may have noticed, above you will find words for "occurring only once.". Hover the mouse over the word you'd like to know more about to view its definition. Click search related words by phrase or description. to find a better fitting word. Finally, thanks to ChatGPT, the overall results have been greatly improved.

Recent Queries