So you love silly arguments too! :P
Perhaps our "disagreement" stems from how used we are to isomorphic as a common word. My mother language is full of greek and latin loanwords/particles in common speech. If I had to guess it's not as pervasive in yours. Or maybe you've been exposed to a lot more math than me! Who knows.
I still can't help but read iso+morph separately (as equal+shape) in "isomorphic javascript".
New words are not a common occurrence, especially when existing words fit the concept (such as isomorphic = same shape; variable = its value can vary; etc.) or parallels can be drawn (function = takes arguments and computes a value; chord = probably because there is a _circle_ of fifths in music where you can draw literal chords).
I see how it can be confusing on tech fields though, but that's just how language works. You could argue there are better alternatives to "isomorphic JavaScript", but to date it's been the only proposal.
That said, I'll try to keep my linguistic creativity to a minimum in tech ;)
