Rather
Rather adverb - To some degree or extent.
Usage example: I say, don't you think that's rather expensive for a hamburger?
Slightly is a synonym for rather in moderately topic. In some cases you can use "Slightly" instead the word "Rather" as an adverb or a noun, when it comes to topics like to some extent, quite. popular alternative
Mutual synonyms
Both words in one sentence
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Rinon is the clearest examples with pupils rather like Nia's from Gurren Laggan but Ayaka's irises appear to change shape slightly when she's using her full power as well.
Source: Exotic Eye Designs - Season 2's second part involving "three Middle Eastern countries" now appears to be a rather heavy-handed, slightly inaccurate, but pretty prescient metaphor on what was then the approaching Iraq War.
Source: The War on Terror -
Slightly subverted in that his wife Larissa has grown to like it, though she would rather not tell him that.
Source: Webcomic / Crimson Dark
Cite this Source
Slightly and Rather. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/rather/slightly
Rather & Slightly. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/rather/slightly>.
Slightly or Rather. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/rather/slightly.
Google Ngram Viewer shows how "rather" and "slightly" have occurred on timeline