If it's a symbol you're going to use in places other than that one
word, you can create a keyboard shortcut for the character itself.
Under Insert | Symbol, find the item you need in the display, click on
it once to select it, and find the button for "Keyboard Shortcut."
Then type some key combination that you'll remember (and that isn't
already used for something else), click "Assign" ("Save in Normal" or
"Save in Template" should already be checked by default), and then you
can easily type it whenever you need it.
For instance, I often need to type letters with a dot underneath. For
all such letters, I assigned keyboard shortcuts of Ctrl-Alt-Period,
<letter>. For letters with a v-shape above (a hachek), I use Ctrl-Alt-
v, <letter>.
(This is for Word2003. Is it different in Word2007?)