antiword.bin: command not found

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 CentOS possible default full paths are:

/usr/bin/antiword.bin - from package: antiword

You may install the required package with command yum install {package}

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