Anyway, there are a number of words that, in common usage (even in dictionaries), are starting to lose their precise meanings, which would be a shame. Here's the ones I can think of at the moment.
uninterested vs disinterested
"Uninterested" means that I don't care; "disinterested" means that I don't have any stake in the question and am a neutral party.
jealousy vs envy
"Envy" means that you have something that I wish I had; "jealousy" means that you've got something that I think rightly belongs to me, or that I'm intolerant of rivalry with regard to that thing.
nausea vs nauseous
"Nausea" (noun) is a feeling of queasiness; "nauseous" (adjective) is something nausea-inducing.
So the question is: are these important distinctions of meaning that it's valuable to preserve? Are there others we should work on maintaining?
Or is it just obnoxious hypercorrectness and linguistic snobbery?