Text aligning like numbers aligning

Question

I am trying to align such that

Some_Text  1. Other Text       
           2. Other Text

I used

\begin{align*}
\text{Some_Text}&\text{Other Text}\\
&\text{Other Text}\\
\end{align*}

But it did not work.

Here is my Preamble:

\documentclass{book}
\usepackage[paperwidth=500mm,paperheight=50]{geometry}

Answer 1

Here's my first try, I am not great with tables, but I would like to try:

\documentclass{amsart}
\begin{document}
\begin{tabular}{lp{\linewidth}}
Some\_Text  & \vspace{-1em}
\begin{enumerate}
  \item Other text
  \item Other text
\end{enumerate}
\end{tabular}
More text.
\end{document}

Here is another possibility (to get over the trick of inserting negative \vspace. This answer is taken from Marco's answer, here, using enumitem package:

\documentclass{amsart}
\usepackage[inline]{enumitem}
\begin{document}
\begin{tabular}{lp{\linewidth}}
Some\_Text&
\begin{enumerate*}[itemjoin={\newline}]
\item foo
\item bar
\end{enumerate*}
\end{tabular}
More text.
\end{document}

Thanks to David for helping me with this one in the chat room.

Answer 2

With a fixed-width column containing the enumeration, the following is a possibility:

\documentclass{article}
\newcommand{\myitem}{\par\refstepcounter{enumi}\theenumi.\ }
\begin{document}
\centering
\begin{tabular}{rp{0.5\linewidth}}
  Some\textunderscore text &
    \myitem Other text
    \myitem Other text
\end{tabular}
\end{document}

If you wish to have a different kind of enumeration display, adjust \myitem to your liking. For example,

\newcommand{\myitem}{\par\refstepcounter{enumi}(\theenumi)\ }

provides brakcets around the numbering. The width of the second column is still an issue (whether it's sufficient or bad, say), but there's not much more one can do with the amount of detail available in the question.