I am not a native speaker so my brain might work differently but I don't believe the theory on associations. We're even talking of a noun vs an adjective. Do people make the same associations also when you hear about a Masters degree? Or when you hear about Slavic people, do you feel for the times when they were enslaved?
I have no problem with replacing master/slave, there are usually clearer names since that pair has been overloaded (though changing master/slave to master/replica should be just as acceptable as e.g. primary/replica or active/backup, for the same reason!). Even outside distributed systems other names are clearer (controller/device for example).