addwords: 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/addwords - from package: Canna

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

On Debian possible default full paths are:

/usr/bin/addwords - from package: canna-utils

You may install the required package with command apt-get install {package}

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