Governoress

How are the following nouns improperly formed, and what should they be? viz.—Lifes, knifes, dwarves, mischieves—boxs, churchs, dishs, fishs—enemys, flys, skys, spys—louses, mouses, oxes, pennys—arcanums, datums, erratums, phænomenons—bacheloress, benefactoress, governoress—boys books, girls dolls, childs rattle—diligence sake; Jane’s, Margaret’s, and Isabella’s mother; John’s, Peter’s, and Frank’s books.

Source: wiktionary

[…] when the hospital established in London for sick governoresses was about to fail for want of proper management, she stepped forward and consented to be placed at its head. Derbyshire and Hampshire were exchanged for the narrow, dreary establishment in Harley street, to which she devoted all her time and fortune. While her friends missed her at assemblies, lectures, concerts, exhibitions and all the entertainments for taste and intellect with which London in its season abounds, she whose powers could have best appreciated these, was sitting beside the bed and soothing the last complaints of some poor, dying, homeless, querulous governess.

Source: wiktionary

It took a firm governoress, boarding school and a finishing school to get rid of the rough edges — and, by her late teens, the young Princess [Alexandra] was emerging as a beautiful and serene woman.

Source: wiktionary

I was introduced by Mrs. Onward, the Governoress, to Mrs. Sapient, the Speakeress of the House.

Source: wiktionary