No, it's not. Unless you think the "n" in french is pronounced "nt".
Scaramouch and crochet though.
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But the question here is chs, not ch. Which though rare, is widely understood to be a kind of guttural sound or "k" sound followed by an s. In -uchs or -ichs coming from German.
Not the "sh" sound in fuchsia.
No, it's not. Unless you think the "n" in french is pronounced "nt".