Base
Base adjective - Not following or in accordance with standards of honor and decency.
Sinister and base are semantically related in characteristic topic. In some cases you can use "Sinister" instead an adjective "Base".
Sinister
Sinister adjective - Being or showing a sign of evil or calamity to come.
Both words in one sentence
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Evil Sounds Deep: The leader of the cultists maintaining the Blackwatch base has a "low and sinister" voice.
Source: Fan Fic / Unfamiliar - This may be a simple base material, or a local source of mana, but if the object is evil, it will be something more sinister, such as blood or even souls.
Source: Self-Healing Phlebotinum -
Gelleshaft however is far more sinister, a Nazi inspired group that has its home base in Germany.
Source: A Nazi by Any Other Name
Cite this Source
Sinister and Base. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/base/sinister
Base & Sinister. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/base/sinister>.
Sinister or Base. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/base/sinister.
Google Ngram Viewer shows how "base" and "sinister" have occurred on timeline