🚀 go-pugleaf

I would like to have \parbox environments with no hyphenation inside.
I want the end product to look like this:

Algebraic      Singular homology and cohomology, the excision theorem,
Topology       long exact sequences from short exact sequences, the
               Kunneth formula

3-Manifolds    Homotopy theory, homotopy groups, covering spaces,
               Van Kampen's theorem,...

The problem is that LaTeX would like to format it like this:

Algebraic Top- Singular homology...
ology          long exact ...

At the moment, I have the following klugey solution in my macro:

\parbox[t]{1in}{{\hyphenation{#1} \bf #1}}

and I have to have an alternate:

\parbox[t]{1in}{{\bf #1}}

because \hyphenation will choke on non-alpha characters.  Is there
a better way?
---
Greg