Harmful
Harmful adjective - Causing or capable of causing harm.
Reasonable and harmful are semantically related. In some cases you can use "Reasonable" instead an adjective "Harmful".
Reasonable
Reasonable adjective - According to the rules of logic.
Harmful and reasonable are semantically related. Sometimes you can use "Harmful" instead an adjective "Reasonable".
Both words in one sentence
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While blindly kowtowing to any fan's protests or demands is often a stupid and harmful idea, there are plenty of times where fans may actually be onto something, even if it isn't phrased in the most polite or reasonable manner.
Source: Vocal Minority -
In true Jane style, she's reluctant to heed any advice about avoiding things that might be harmful to the baby—exposure to crime scene chemicals, etc, and takes polite and perfectly reasonable suggestions—"have a seat"—as sexist and patronizing.
Source: Series / Rizzoli & Isles
Cite this Source
Reasonable and Harmful. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/harmful/reasonable
Harmful & Reasonable. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/harmful/reasonable>.
Reasonable or Harmful. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/harmful/reasonable.
Google Ngram Viewer shows how "harmful" and "reasonable" have occurred on timeline