I tend to use them, but only when creating names, and I set out a reasonably simple grammatical structure for the names.
Typically I do it with ship class names. But quite a lot of the time I can avoid them by using different emphases (that the right word?)
For instance, I created a naming system for a specific race. The first syllable would determine whether the class was a ship or a base (Ja- for a ship, Weh- for a base). Then it got more complicated:
The second part of the name--usually two syllables--would have four letters. The first letter (capital) would determine whether it was a capital ship (H), a cruiser (G) or an escort (F). The third letter would determine whether it was a ship-of-the-line vessel (-r-), a support ship (-l-), a combination of the two (-y-) or a carrier (-yr-). The second and fourth letters would determine whether the vessel was heavy for its type (-u-i), medium (-e-o) or light (-o-a).
Therefore, a heavy capital line ship was a JaHuri, a light cruiser support/line ship would be a JaGoya, and a carrier variant of the JaGoya would be the JaGoyra.
Oh, and for bases a -Q would be added at the end, just to distinguish between land, sea and space bases (so a heavy capital line base, or in other words, a war base, would be a WehHuriQ)
Once it got into fighter territory I gave up