wordforms: 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/wordforms - from package: hunspell-devel

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

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