The phrase "further tumultuous" is correct and usable in written English.
You can use it to describe a situation that is already chaotic or disorderly, but is expected to become even more so. Example: "The country was already in the midst of a tumultuous political upheaval, but with the upcoming elections, experts predicted that things would only become further tumultuous."
The further that tumultuous decade, whose spirit extended well beyond it, recedes into the mist, the more its popular music becomes grist for lighthearted nostalgia with a tinge of camp.
Although the idea that the inspiration for the 22 "Indies" and four "Indys" came from this newspaper's title can likely be discounted, further evidence that the tumultuous plebiscite of 2014 affected name choices comes in the shape of the two bairns dubbed "Freedom".
"His actions prevented further injury and escalation of tumultuous conduct.
The N.F.L. further distanced itself from its tumultuous past regarding concussions on Tuesday by selecting two new co-chairmen for a renamed policy committee and accepting the resignation of one of that group's most prominent members.
"The financial crisis that first erupted with the US sub-prime mortgage collapse in 2007 has deepened further in the past six months, and entered a tumultuous new phase in September," the fund warned.
Those moves further strained nerves on financial markets after a tumultuous fortnight for the pound.
If voters reject Prop 30, it is believed that the University of California will accelerate its course of privatization and spark further student protests that will make last year's tumultuous demonstrations look mild.
Yet the Palestinian roadside attacks and the heavy Israeli fire made for another tumultuous day, and both sides warned of further escalation.
Declining to criticize Bologna's actions before further investigation, Kelly told reporters on Wednesday that the protesters' "tumultuous conduct" had prompted the police's efforts to break up their protest.
Germany, defeated in that tumultuous match 50 years ago this week, have since reached the final on six further occasions, winning three of them, including the most recent.
