5
asynchronous(adjective, concurrent)
2
anachronic
2
anachronistic
2
at different times
2
serial
2
unsynchronised
2
unsynchronized
1
allochronic
1
anachronous
1
earliest
1
nonparallel
1
nonsynchronous
1
unsynchronous
0
diachronic
0
historical
0
in series
0
lost
0
non-synchronous
0
noncontemporary
0
nonsimultaneous
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APASmart Define. (2016). synchronous thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/synchronous/thesaurus/antonyms
ChicagoSmart Define. 2016. "synchronous thesaurus" https://smartdefine.org/synchronous/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, synchronous thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/synchronous/thesaurus/antonyms>.
MLASmart Define. "synchronous thesaurus" 10 March 2016. Web. 22 September 2026. <https://smartdefine.org/synchronous/thesaurus/antonyms>