oowriter: 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/oowriter - from package: libreoffice-writer

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

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