They sound right. They aren't.

Why the swap holds Correct form. Listed because "up and arms" and "up and at arms" appear as eggcorn variants — the preposition "in" gets smoothed to "and" in speech.

Why the swap holds "Utmost" (from outmost + ut-) is a fossilised superlative. "Upmost" fits the vertical metaphor of high priority almost better — which is why the eggcorn thrives.

Why the swap holds "Vale" (valley) is archaic outside this biblical phrase. "Vail" (an obsolete verb meaning to lower or doff) reads as a downward motion — sorrow bowing the head — which close enough fits the mood.

Why the swap holds The "n" in "Valentines" gets misheard as "m" (nasal assimilation before "d"). The eggcorn reanalyses the word as "Valen" + "times" — as in "Valentine times," which makes surface sense for the season.

Why the swap holds "Valentine's" reparsed as "Valentime's" through nasal assimilation — "n" becomes "m" before "s" in fast speech. Often heard in children's speech.

Why the swap holds "Varicose" (from Latin varix, a swollen vein) is medical Latin. "Very close" parses plausibly — the veins do sit close to the skin's surface.

Why the swap holds "Varicose" (dilated, from Latin) reparsed phonetically as "very close" — close to the skin's surface, which is actually true of varicose veins. Accidentally accurate.

Why the swap holds "Chord" (harmony) vs "cord" (string) — since the cords vibrate musically, the musical spelling creeps in. Technically anatomically wrong.

Why the swap holds French "voilà" (there it is) is hard to spell if you've only heard it. "Wallah" reads as the magician's flourish it usually accompanies. A borrowed word going native through the ear.

Why the swap holds An intrusive "r" appears in many Midland and Appalachian US dialects — "warsh" for "wash," "Warshington" for "Washington." Parses by ear as a related short word that fits the cleaning-scrub sound.

Why the swap holds "Waive" (give up a claim) and "wave" (a hand gesture) are homophones. "Waving goodbye to your rights" is almost idiomatic — so "waving rights" slips in as a plausible image.

Why the swap holds "Wary" means cautious; "weary" means tired. "Weary of" reparses the caution as exhaustion — a plausible tone shift, but the wrong feeling.

Why the swap holds "Wrench" (thrown into machinery) is the image — sabotage. "Wench" (an archaic word for a woman) is vivid but shifts the metaphor into awkward territory.

Why the swap holds "Whet" (to sharpen) is rare outside this phrase. "Wet" is everyday — and since appetite ties to salivation, the wrong form even feels physiological.

Why the swap holds "Whet" = to sharpen (a whetstone sharpens a blade). An appetiser sharpens hunger. The eggcorn imagines wetting the mouth — plausible, wrong.

Why the swap holds "Whet" means sharpen or stimulate; "wet" fits the drinking context (whistle = throat). Both are historically attested and dictionaries now accept both.

Why the swap holds "Barrow" (a carrying frame, Old English) survives mostly in this word. "Barrel" is familiar and shaped like the bucket of a wheelbarrow — the reanalysis is visual.

Why the swap holds WEATHER (verb) = to endure (the storm). WHETHER = if. The two homophones surface in this idiom and elsewhere ("come hell or high weather").

Why the swap holds "Chill" and "shield" alliterate with "wind" and are close in shape. A "wind shield factor" sounds like how well something blocks wind — which is an adjacent weather concept, so the eggcorn makes surface sense.

Why the swap holds "Wind chill" (the cooling effect of wind on skin) reparsed as "windshield" — the thing that blocks wind. Similar weather-adjacent idea, wrong compound.

Why the swap holds "Bated" (from abate, to lessen) is rare outside this phrase. "Baited" evokes fishing lures, which is vivid but wrong — though a common reader barely notices.

Why the swap holds "Ado" (fuss) is rare outside Shakespeare. "Adieu" (farewell) is a familiar Frenchism — and a farewell before a performance sort of fits.

Why the swap holds "Woe" is archaic outside this phrase. Writers reach for the familiar "woah/whoa" (an interjection of surprise), which reads as a dramatic outburst even though it loses the original sense of sorrow.

Why the swap holds "Whirlwind" becomes "world wind" — a romance that sweeps through your whole world. The mis-parse is emotionally accurate even while the meteorology is wrong.

Why the swap holds "Worst comes to worst" is older (16th century). "Worse to worst" reparses it as a progression — sensible enough that both are now accepted.

Why the swap holds The superlative "worst" flattens to the comparative "worse" in speech. Writers capture what they hear, though the idiom logically demands the superlative.

Why the swap holds "Rack" refers to the torture device — hence "rack one's brains" (torture them for answers). "Wrack" (wreckage, destruction) feels more violent, and the two have been blurred since at least the 1600s.

Why the swap holds "Wrecking" (destroying) reparsed as "wreaking" (inflicting, as in "wreaking havoc"). A near-synonym that blurs the compound.

Why the swap holds "Wreak" (to inflict) is rare outside this phrase. "Wreck" is ubiquitous — and wrecking things is literally what havoc does.

Why the swap holds A "wreck-less" driver sounds cautious — yet "reckless" means the opposite. The hyphenation inverts the meaning entirely, caught only by careful readers.