Defence
Defence noun - The act of defending someone or something against attack or injury.
Security is a synonym for defence in protection topic. In some cases you can use "Security" instead a noun "Defence".
Security
Security noun - Means or method of defending.
Defence is a synonym for security in guards topic. You can use "Defence" instead a noun "Security", if it concerns topics such as precautions.
Mutual synonyms
Related pairs
How words are described
| good | good defence | good security |
| high | high defence | high security |
| physical | physical defence | physical security |
| low | low defence | low security |
| Other adjectives: best, better, normal, standard, poor, effective, actual, entire, excellent, personal, internal, new, major, possible, military, extra, additional, highest, added. | ||
Both words in one sentence
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It has roughly 30k active personnel and five combat squadrons for the usual stuff; its other tasks include surface-to-air defence, tactical and VIP transport and air base security.
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Clive: The Queen appoints a Governor General in charge of internal security and external defence but she's still the de facto sovereign.Dr.
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Wardens who picked up litter with spiked sticks here had a higher security clearance than the Secretary of State for Defence.
Source: Overt Rendezvous
Cite this Source
Security and Defence. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/defence/security
Defence & Security. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/defence/security>.
Security or Defence. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/defence/security.
Google Ngram Viewer shows how "defence" and "security" have occurred on timeline