Sigur's answer is just the right solution. It does the job, cleanly and easily, but what fun is to take always the easy way?
Here you are two (some more convoluted) ways to obtain the same, but without any environment, where is easy include auto-numbered labels and even add these to the TOC. May be these are more consistent reasons than "for fun" ... others could be that you need several description-like numbered paragraphs and/or with different styles that can be mixed anywhere. Have fun.

\documentclass{scrartcl}
% page layout (optional)
\pagestyle{plain}\parskip.3em
% dummy example text
\def\dummytext{This is a long dummy sentence that mean
nothing and take only some more that one line. }
\begin{document}
\section{Kinky use of \texttt{\textbackslash paragraph}}
% ===== settings =====
\setcounter{tocdepth}{4}
\setcounter{secnumdepth}{4}
\makeatletter
\renewcommand*\l@paragraph{\@dottedtocline{4}{2em}{5em}}
\renewcommand\paragraph{\@startsection{paragraph}{4}{\z@}%
{3.25ex \@plus1ex \@minus.2ex\hangindent3em}{-1em}%
{\normalsize\sffamily\bfseries}}
\makeatother
\renewcommand\theparagraph{Chapter \arabic{paragraph}}
% ===== Check of TOC results ======
{\footnotesize
\renewcommand\contentsname{\hrulefill}
\tableofcontents\hrulefill
}
% ===== Use examples =======
\setcounter{paragraph}{1} % Omit Chapter 1
\paragraph{} \dummytext\par % Numbered label
\dummytext % Normal paragraph whitin the pseudo-list
\paragraph[\mbox{}]{} \dummytext % Numbered label in TOC
\paragraph*{Annex A} \dummytext\dummytext % Custom label
\paragraph[description]{The Last Chapter} % Custom numbered label in TOC
\dummytext\dummytext
\section{Autonumbered macro \texttt{\textbackslash chapdescr}}
% ===== definition =====
\newcounter{chapterdescr}\setcounter{chapterdescr}{1}
\def\chapdescr{%
\addtocounter{chapterdescr}{1}\par\noindent%
\hangindent3em\textbf{\sffamily Chapter \arabic{chapterdescr}}\hskip1em}
% ===== Use examples =======
\chapdescr \dummytext\par
There are no option here, nor special paragraph skips nor
entries in TOC. You can use also normal paragraphs
whitin the pseudo-description lists.
\chapdescr \dummytext\dummytext
\end{document}
\begin{description} \item[label] description \end{description}– Sigur Feb 22 '16 at 13:37\documentclass{}...\begin{document}etc. As it is, most of our users will be very reluctant to touch your question, and you are left to the mercy of our procrastination team who are very few in number and very picky about selecting questions. You can improve your question by adding a minimal working example (MWE) that more users can copy/paste onto their systems to work on. If no hero takes the challenge we might have to close your question. – Martin Schröder Feb 23 '16 at 06:22