Sentence:  Shared <WSD>obsolescences</WSD> can be of some significance when connected with a functional replacement. If two languages replace an earlier word for 'nose' with some other term and also lose the traditional term, this double agreement is of significance for judging the existence of a common historical period. 
Meaning of the word marked with <WSD> tags:  The process of becoming obsolete, outmoded or out of date.