80 entries under verb topic. ×

9
fasten(separate, release, secure, join)
5
fix(close, cool, disorder, detach)
4
bind(separate, remove, forget, uncover)
4
secure(close, disregard, fail, attach)
4
tie(noun, separate, divide, connect)
2
attach(separate, join, loose, fasten)
2
adjoin
2
append
2
bar(noun, open, secure, loose)
2
bolt(noun, fasten)
2
button(noun, close)
2
clamp(fasten, loosen)
2
clasp(close, open, release)
2
engage(break, retreat, shun)
2
join(part, open, loose)
2
lace(fasten, intertwine)
2
link(separate, loose, connect)
2
lock(noun, open, fasten, clasp)
1
bond(open, stick, fasten)
1
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APASmart Define. (2016). unfasten thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/unfasten/thesaurus/antonyms
ChicagoSmart Define. 2016. "unfasten thesaurus" https://smartdefine.org/unfasten/thesaurus/antonyms (accessed September 30, 2026).
HarvardSmart Define 2016, unfasten thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/unfasten/thesaurus/antonyms>.
MLASmart Define. "unfasten thesaurus" 26 February 2016. Web. 30 September 2026. <https://smartdefine.org/unfasten/thesaurus/antonyms>