Sorting the nomenclature description

Question

I am using nomencl package to prepare the nomenclature for my thesis. In that, the package sorts the symbols as shown in Figure.

But I want the desription of the symbols in Right hand side to be sorted in alphabetical order without using prefix option as shown in Figure.

using of prefix option work consumes lot of time and manual effort. Kindly suggest solution.

MWE code:

\documentclass[a4paper]{report}
\usepackage{nomencl}
\makenomenclature
\begin{document}
\nomenclature{$\omega$}{Absolute Frequency}
\nomenclature{HOA}{Acetic acid}
\nomenclature{Al}{Aluminium}
\nomenclature{ASTM}{American Standard Testing Machine}
\printnomenclature
\nocite{*}
\bibliographystyle{thesis}
\bibliography{refpapers}
\end{document}

Answer 1

Per request to turn my comment into an answer: you could define a command

\newcommand\Nomenclature[2]{\nomenclature[#2]{#1}{#2}}

that automatically inserts the description to the optional sorting argument of \nomenclature and then use it instead of nomenclature:

\documentclass[a4paper]{report}

\usepackage{nomencl}
\makenomenclature

\newcommand\Nomenclature[2]{\nomenclature[#2]{#1}{#2}}

\begin{document}
Text% to produce a non-empty page

\Nomenclature{$\omega$}{Absolute Frequency}
\Nomenclature{HOA}{Acetic acid}
\Nomenclature{Al}{Aluminium}
\Nomenclature{ASTM}{American Standard Testing Machine}

\printnomenclature

\end{document}