function-command-variants.vim

fu Function1()
endf

fun Function2()
endfu

func Function3()
endfun

funct Function4()
endfunc

functi Function5()
endfunct

functio Function6()
endfuncti

function Function7()
endfunctio

function Function8()
endfunction

fu! FunctionWithBang1()
endf

fun! FunctionWithBang2()
endf

" Cheating a bit, don't bother checking func!, funct!, functi! and functio!...
function! FunctionWithBang3()
endf