kantiword: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/kantiword - from package: antiword

You may install the required package with command apt-get install {package}
Error in other languages:
kantiword: bevel nie gevind nie
kantiword: comandă negăsită
kantiword: comando não encontrado
kantiword: commande introuvable
kantiword: command not found
kantiword: käsku ei ole
kantiword: không tìm thấy lệnh
kantiword: komanda nerasta
kantiword: Kommando nicht gefunden.
kantiword: kommandot finns inte
kantiword: komut yok
kantiword: nie znaleziono polecenia
kantiword: níor aimsíodh an t-ordú
kantiword: no se encontró la orden
kantiword: no s'ha trobat l'ordre
kantiword: opdracht niet gevonden
kantiword: parancs nem található
kantiword: perintah tidak ditemukan
kantiword: príkaz nenájdený
kantiword: příkaz nenalezen
kantiword: команда не найдена
kantiword: командата не е открита
kantiword: 命令找不到
kantiword: コマンドが見つかりません