findthatword: 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/findthatword - from package: findthatword

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

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