More explicit request on \bold in markup

[info]

> > Hello- don't know where to look in the manual for a single word made
> > bold inside a set of words in a \markup
> > I'm using 2:14 to finish up a major work that's taken 2 years so I
> > would like to stick with it.
> > If this is not possible in version 2:14 then I'll do without.
>
> Uh,
>
> \markup { With a \bold single bold word }
>
> Where is the problem?
>
> --
> David Kastrup
As usual I don't know how to phrase the question first time here's what 
I want;
in the following I need to emphasize either larger or bolder the single 
word maps.
David's suggestion does not work I suspect because it's already some 
form of bold.  So I need more info or a suggestion, and pointing to the 
manual so i know where to look next time is most educational.
Here's the header

\header {
  title = "The Map"
  subtitle = "What kind of map"
  subsubtitle = \markup {\center-column { "Scene 5" "This scene 
introduces the maps projected behind P & D."" P's map is the D'Scudery 
map of love, D's is a map of Marseille."" Each map should have a sort of 
'you are here' spot lit on them.""  This light should move as they move 
along their paths to themselves."}}