Ok I admit I had to re-read this book’s review.
https://www.amazon.com/Making-Sense-Nonsense-Logical-Spirituality/dp/0738763160
But it go me wondering about other names for ‘nonsense’, not in the dictionary.
I fondly recall a local Surrey Uk word ’ twaddle’ as one contender. Then there was my father’s lovely barber-shop slang, ‘balderdash’, for, well, piffle!
Post your favorite below.
Thank you.
“Twaddle” is, as far as I know, prevalent throughout Great Britain and Ireland. “Balderdash” is also pretty universal.
I’m not quite sure what you’re after here … ? Common words for codswallop?
This thread could end up as [a load of] tripe
When we’re being serious, Yanks seem to favor excrement, so BS (that’s the compressed version) is probably the most usual. “Crap” and similar (I think I needn’t insult everyone’s intelligence by taking it further) are up there, too. I might say “nonsense” if I were using a more polite register, but I’d be more likely to say “wrong” or “mistaken”. I would say “twaddle” for a laugh.
Ah the ‘cod’s stroke’. Wonder did some event give rise to that one?
Garbage.
How about consulting a thesaurus - this is what they are for after all 
From Chambers Thesaurus:
noun
rubbish, trash, drivel, balderdash, gibberish, gobbledygook, senselessness, stupidity, silliness, foolishness, folly, twaddle, ridiculousness, codology, blague, doggerel; dialect faddle, havers; dialect & N Am blathers; Scot blethers, clamjamphrie
old galimatias
colloq. stuff and nonsense, double Dutch, mumbo-jumbo, bunk, bunkum, claptrap, cobblers, poppycock, piffle, waffle, flannel, rot, tripe, tosh, bosh, tommyrot, codswallop, baloney, humbug, hooey, bilge, bull, blah, eyewash, hogwash, rhubarb, guff, malarkey, moonshine
You can look up the Slang/vulgar part yourself.
I think we should revive the word galimatias. It’s great.
https://www.yourdictionary.com/galimatias
Andrew
Now there is one I have never heard of before. Like, dumheter, or spokfloup, only better … lol :0)
Folderol.
Reading the book description in the OP, it strikes me that the book uses “nonsense” not for erroneous material, but for fanciful or whimsical material. It specifically mentions Dr. Seuss; Edward Lear might also qualify. This is a different thing entirely from the synonyms we’ve proposed.
Caprice.
For Glasgow and the West of Scotland it’s ‘mince’ , ‘pure mince’ if the nonsense is unadulterated.
Drivel