\makebox[<width>]{...} creates a box of fixed length and centres its content by default if the content is shorter then the box. However, you would need to "find" the correct value of the parameter <width>.
A more convenient macro is defined in eqparbox, that is \eqmakebox[<label>]{...}. The difference is you supply a label, e.g. list, instead of a length <width> and a length of all boxes corresponding to the same label [list] are calculated to fit the longest content.
\documentclass{article} \usepackage{eqparbox} \newcommand\mb[1]{(\eqmakebox[list]{#1})} \begin{document} \paragraph{Testing} \begin{itemize} \item \mb{Help} \item \mb{Individual} \item \mb{Test} \end{itemize} \end{document}
