Those are good ones to ask about, Suzanne. The confusing, conflicting, dangerous type.
I sure would like to see other answers besides my own!
For apparent and apparently, I'm not sure when I started this or why, but I find it works well:
jap = apparent
japy = apparently
For the complain variations, these are possibilities, not necessarily the greatest in the world, for sure:
cof = complain of
cofg = complaining of
cofs = complains of
coft = complaint of
cofts = complaints of
Another bizarre one, with the hap at the beginning for approximate words, just to differentiate is why I suppose I like them:
hap = approximate
hapy = approximately
And then, for appropriate words:
appe = appropriate
appy = appropriately
apps = appropriateness
iappe = inappropriate
iappy = inappropriately