The phrase 'insurmountable differences' is correct and usable in written English.
You can use it when referring to two things that do not share the same qualities and that cannot be reconciled. Example sentence: Despite our best efforts, we could not bridge the insurmountable differences in our opinions.
As the death toll grows higher, we learn more about the seemingly insurmountable differences that exist between Israel and the Palestinians.
The papers detail the deal under which each side overcame its apparently insurmountable differences over how a transitional justice process would work.
We had a dismal compatibility rating (two yellow stars) and some glaring, insurmountable differences: age, the fact that I'm an outdoors person, and the "Boston factor".
The fight over Mr. Essawy's grave is a tiny skirmish in the long, intensifying battle over this parcel of land, a fight that speaks to the seemingly insurmountable differences, hostility and distrust between the Israelis and the Palestinians.
To questions of how these seemingly insurmountable differences might be surmounted, Marc Grossman, who replaced Holbrooke as Clinton's special representative, replies simply: "I don't know whether these people are reconcilable or not.
In some areas it superseded custom, particularly when there was no conflict between the two; in others, Roman and customary law existed side by side, with custom prevailing when there were insurmountable differences.
The deficit of prokaryotes relative to eukaryotes is then apparently reduced to a mere 8-fold--surely not an insurmountable difference, especially if bacteria internalise respiration to some extent on invaginated membranes, as happens in more complex prokaryotes like cyanobacteria, with their internal thylakoid membranes.
"At the time, it seemed there were insurmountable lifestyle differences".
Seemingly insurmountable cultural differences, frustration, discrimination, poverty: each play a part.
There is no happy ending — only exposure, and a sudden, startling acknowledgment of insurmountable class differences.
At the bottom, Chester's 2-2 drawithth Aldershot condemned them to the Blue Square Premier, due to an insurmountable goal-difference gap.
