Base
Base noun - An immaterial thing upon which something else rests.
Usage example: the firm belief that complete trust between husband and wife is the base of any successful marriage
Rationale and base are semantically related in basis topic. In some cases you can use "Rationale" instead a noun "Base", when it comes to topics like reason.
Rationale
Rationale noun - A statement given to explain a belief or act.
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Synonyms for Rationale
Base and rationale are semantically related in reason topic. Sometimes you can use "Base" instead a noun "Rationale".
Mutual synonyms
How words are described
Both words in one sentence
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We Have Reserves: Red Skull's rationale for deciding to work the POWs to death building their weapons, and later when causing their base to self-destruct.
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No rationale for why a cluster of disembodied energy nodes would work like Conway's cellular automata is provided, but give Piers his credit: at least he tried to base his Energy Beings on something coherent, which is more than other users of this trope seem inclined to do.
Source: Energy Beings
Cite this Source
Rationale and Base. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/base/rationale
Base & Rationale. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/base/rationale>.
Rationale or Base. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/base/rationale.
Google Ngram Viewer shows how "base" and "rationale" have occurred on timeline