Background
Background noun - The physical conditions or features that form the setting against which something is viewed.
Defense and background are semantically related. In some cases you can use "Defense" instead a noun "Background".
Defense
Defense noun - Means or method of defending.
Background and defense are semantically related. Sometimes you can use "Background" instead a noun "Defense".
Both words in one sentence
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All There in the Manual: Little of the background is mentioned in game, but you play a mercenary hired by the military to investigate an AI defense system gone haywire.
Source: Videogame / P.N.03 -
In the plot's defense, it does try to justify it via Hate Plague, and one of these people — Keiichi — actually does have some violent background before coming into contact with said Hate Plague.
Source: Insane Equals Violent - In the background information for the series (and sometimes alluded to on-screen) it's stated that nanomachines are ubiquitous in people as well as defense for nanomachine attacks.
Source: Nanomachines / Live-Action TV
Cite this Source
Defense and Background. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/background/defense
Background & Defense. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/background/defense>.
Defense or Background. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/background/defense.
Google Ngram Viewer shows how "background" and "defense" have occurred on timeline