Here's what rhymes with idealizing.

Consider these alternatives

romanticizing / rising idealised / realized sentimentalizing / rising demonizing / rising sentimentalism / given sentimentalize / size sentimentalized / sentimentalised idealization / relation conventionality / personality sentimentality / personality dissimulation / relation archaism / given antonym / him deifying / dying mythologizing / rising changeability / stability didacticism / position impressionistic / characteristic overemphasizing / rising