wordlist2hunspell: 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 CentOS possible default full paths are:

/usr/bin/wordlist2hunspell - from package: hunspell-devel

You may install the required package with command yum install {package}
Error in other languages:
wordlist2hunspell: bevel nie gevind nie
wordlist2hunspell: comandă negăsită
wordlist2hunspell: comando não encontrado
wordlist2hunspell: commande introuvable
wordlist2hunspell: command not found
wordlist2hunspell: käsku ei ole
wordlist2hunspell: không tìm thấy lệnh
wordlist2hunspell: komanda nerasta
wordlist2hunspell: Kommando nicht gefunden.
wordlist2hunspell: kommandot finns inte
wordlist2hunspell: komut yok
wordlist2hunspell: nie znaleziono polecenia
wordlist2hunspell: níor aimsíodh an t-ordú
wordlist2hunspell: no se encontró la orden
wordlist2hunspell: no s'ha trobat l'ordre
wordlist2hunspell: opdracht niet gevonden
wordlist2hunspell: parancs nem található
wordlist2hunspell: perintah tidak ditemukan
wordlist2hunspell: príkaz nenájdený
wordlist2hunspell: příkaz nenalezen
wordlist2hunspell: команда не найдена
wordlist2hunspell: командата не е открита
wordlist2hunspell: 命令找不到
wordlist2hunspell: コマンドが見つかりません