I'm writing an article, and I would like to know if you say mortise or recess? Recess would be the opposite of tenon when chucking. Some YouTube masters are calling the recess a mortise. Is that an acceptable name? Also, when you make an urn, the "hole" where the lid goes in, whether a screw-on lid or push fit, is that a recess or a mortise. Would it make a difference to add, say, African blackwood insert with female threads into the recess? Would it then be a mortise? I always thought mortise was a "carpentry" or furniture maker word. I never heard a professional woodturner say now make a mortise. They always say make a recess for the chuck. I say, I will now glue the insert into the recess. I'm woodturning not building a Sam Maloof chair, LOL