The word trampoline forms a normal S plural, trampolines.
Trampoline.
Do you mean that thing you jump on? That's spelled "trampoline".
un trampoline (masc.)The spelling is from French, but the pronunciation is slightly different.
j'aime aller sur mon trempoline
That is the correct spelling of "trampoline" (equipment on which you bounce, for exercise or sport).
The correct spelling of the word is trampoline.
The plural way to spell studio is studios.
The plural is resources.
The plural is cantaloupes.
The plural is hooves.
The plural is cherries.
The plural is roses.