[Tex/LaTex] Newline after each element in description environment

descriptionlists

I have a quite a big amount of descriptions in my document. At the moment all of them look in the default manner. I use it to define terms with texts or with a list of keywords. Therefore, I often use something like this:

\begin{description}
    \item[Term One] Definition for term one.
    \item[Term Two] \hfill \begin{itemize}
        \item First keyword
        \item Second keyword
    \end{itemize}
\end{description}

Now the definition of Term One stands on the same line like Term One and the First keyword starts on a new line.

My desired output would be that the definition for Term One begins on a new line and that the First keyword describing Term Two is displayed on a new line. All in all, it should look like:

Minimal example

My problem is that if I use 

\usepackage{enumitem}
\setlist[description]{style=nextline}

I get a newline before the first keyword. It would be great if anybody can point out a solution where I do not have to change the code above (deleting the \hfill is ok).

Best Answer

I hope I understood your question correctly, if so, the following gives you an environment initemize which simply negates the additional one-line space given when using style=nextline:

\documentclass{article}
\usepackage{enumitem}
\setlist[description]{style=nextline}

\newenvironment{initemize}{%
  \vspace{-\baselineskip}
  \begin{itemize}%
}{%
  \end{itemize}%
}

\begin{document}
\begin{description}
  \item[Term1] Definition for term one.
  \item[Term2] \hfill
    \begin{initemize}
      \item First keyword
      \item Second keyword
    \end{initemize}
  \item[Term3] With some text and then a normal itemize.
    \begin{itemize}
      \item key1
      \item key2
    \end{itemize}
\end{description}
\end{document}

output

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