This is a proof of principle using the url package. I haven't time to iron out any glitches but some variant of this idea will work, bearing in mind the general issue of what a hyphen actually means in your document (see comments). This solution will just break the word without a hyphen if required after the initial hyphen.
\documentclass[10pt, a4paper]{article}
\usepackage[a4paper, margin=3cm, driver=dvips]{geometry}
\usepackage{multicol}
\setlength{\columnsep}{30pt}
\usepackage{url}
\urlstyle{same}
\renewcommand{\UrlBreaks}{\do\.\do\@\do\\\do\/\do\!\do\_\do\|\do\;\do\>\do\]\do\)\do\,\do\?\do\'\do+\do\=\do\#\do\*\do\-\do\~\do\"\do\a\do\e\do\i\do\o\do\u\do\1\do\2\do\3\do\4\do\5\do\6\do\7\do\8\do\9\do\0\do\b\do\c\do\d\do\f\do\g\do\h\do\j\do\k\do\l\do\m\do\n\do\p\do\q\do\r\do\s\do\t\do\v\do\w\do\x\do\y\do\z\do\A\do\B\do\C\do\D\do\E\do\F\do\G\do\H\do\I\do\J\do\K\do\L\do\M\do\N\do\O\do\P\do\Q\do\R\do\S\do\T\do\U\do\V\do\W\do\X\do\Y\do\Z}
\begin{document}
\begin{multicols}{2}
\textbf{aham-turuk} umdrehen, umkehren, tauschen \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, \url{-teberukdfgfdsgfdgfdgfg}, -toho, -teg, ahakey-toho, ahakey-roho, ahakey-moho-sumo, -uruk, -waruk, -teg, -toto, -tarum, -zug, -tuhouamanaratazam, -ratazamjok-limatahanan
\end{multicols}
\end{document}