Description list with aligned descriptions
This is one possibility:
\documentclass{article}
\usepackage{calc}
\usepackage{enumitem}
\begin{document}
\begin{description}[leftmargin=!,labelwidth=\widthof{\bfseries The longest label}]
\item[The longest label] text
\item[Short] long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long text
\end{description}
\end{document}