Fastening
Locking
Locking noun - The act of locking something up to protect it.
Mutual synonyms
Both words in one sentence
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Earlier, Tommy also makes a point of locking the door and fastening his seat belt before driving off even though the freaking Tyrannosaur chasing him seemed to be the greater safety hazard.
Source: Fantasy Helmet Enforcement - A man who hears multiple alarms when he enters his car and turns them off by closing the car door, locking it, fastening his seat belt and zipping up his pants.
Source: So Bad Its Good / Film
Cite this Source
Locking and Fastening. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/fastening/locking
Fastening & Locking. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/fastening/locking>.
Locking or Fastening. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/fastening/locking.
Google Ngram Viewer shows how "fastening" and "locking" have occurred on timeline