Maintain
Upkeep
Upkeep noun - The act or activity of keeping something in an existing and usually satisfactory condition.
Both words in one sentence
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They are semi-independent yet owe their loyalty to the Imperium, and maintain their own upkeep using (usually) a Star System.
Source: Feudal Future - In the Total War games, you can build as many units as you want, provided you can maintain their upkeep.
Source: Arbitrary Headcount Limit - It costs a whopping amount of upkeep to maintain, and you need to actually get to Syrianna and back if your civilization isn't already on it, but... It's a Monster Bombard!
Source: Disc One Nuke
Cite this Source
Upkeep and Maintain. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/maintain/upkeep
Maintain & Upkeep. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/maintain/upkeep>.
Upkeep or Maintain. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/maintain/upkeep.
Google Ngram Viewer shows how "maintain" and "upkeep" have occurred on timeline