The phrase "all unfounded" is correct and usable in written English.
It can be used to describe claims, beliefs, or accusations that lack evidence or basis in fact.
Example: "The allegations made against the company were all unfounded, as there was no proof to support them."
Alternatives: "entirely baseless" or "completely groundless".
"It's all unfounded," another officer said.
The department received 44 such calls last Tuesday, all unfounded, and it handled 375 bomb threats and reports between Sept. 11 and Oct. 10.
Mr. O'Reilly will defend himself in court fully and aggressively against all unfounded, opportunistic claims, and he will seek all appropriate legal remedies as well," the statement read.
There are natural fears, not all unfounded, about a sudden tide of foreign people, and in the light of violent events around Europe it is easy to amplify them.
Some studies claim that running raises a child's IQ, others give dire warnings – all unfounded – about what happens if you continue running after a certain point in the pregnancy.
After weeks of frustrated hopes, it now appears that the baby was murdered soon after it was stolen, and that the complicated rumours and counter-rumours that have filled the newspapers were one and all unfounded.
Société Générale issued a lengthy statement after the close of trading, saying it "categorically and vigorously" denied all the "completely unfounded" market rumors that affected its share price.
James had always been good with his hands, even as a boy, when his belief that anything he could imagine he could also make was as strong and urgent in him as all the other unfounded faiths of childhood.
Soci? G rale issued a lengthy statement after the close of trading, saying it "categorically and vigorously" denied all the "completely unfounded" market rumors that affected its share price.
Asked what he would say to McCullum, he replied: "Why?" It is possible, given all the allegations – unfounded though the jury found them to have been – that cricket would have no urgent desire to find a place for Cairns within it.
Otherwise, Waugh's prediction proved unfounded; all the fiction remained in print and sales stayed healthy.
