Hi,
Although I agree that Libra Office is a quite good program, I don't think it is at the level of Microsoft word. And this, for many reasons. Libra Office can't stant large documents like 200 or 300 pages. It will crash (guaranteed and promised). Secondly, Libra Office, at least the last version I tried does not support a language layout, or at least, it is not detected by screen readers. For example, if you are reading an English text, and suddently, after a paragraph it turns to Italian, marked by language in the languages section, not a simple English layout, NVDA, or JAWS, or Window-eyes won't detect Italian or any other language. Also, other features related to word-processing are not as professional as Microsoft Word's ones. I believe there is a custom purchase you can make from Microsoft with the applications you need from the Office package. That may save you some money.

@Dark, Microsoft Word may not have a significantly higher number of advanced word-processing features, but, as I find it, at least to me, word is much more professional in many features it provides. For example, you can create a numbered list like:
1. Dark.
2. Afrim.
3. Dark.
And you will not need to add the numbers for as many items as you write on a new line, cause Word will do it for you. By the way, this is not only related to numbers, but other characteristics such as bullits, underline, bold, italics, and indentations, or even formatting which is preserved throughout the text.
For example, to create a bullit list, on a word document, you press *+tab, and then begin to write the list of words, concepts or terms to be presented in the document.
Another important thing is that Microsoft word is more intelligent in word order, word form, and punctuation, for it will suggest you that, for example, it is "has died" and not "has dead". And when you write a question like, "what's the weather like today?", if you don't put a questionmark after the word today, press application, and you will see that word suggests replacing this word today, by a today accompanied by a question mark. A great characteristic of word is that you can browse the document by heading, or you can search for a word, and Microsoft Word will place the cursor right to the word and result you stopped at. For example, if you search for the word "Relativity", Word will look throughout the document and will present the results from the beginning to the end of the document. The good thing is that screen readers will state the whole phrase in which this word is used, so you know well where you should stop. Browsing the document by heading is one of the most outstanding features of word, particularly if you use Microsoft word for books or large, well-formatted documents. You can jump from chapter to chapter, or anywhere where a heading is detected. This really helped me this year at university. Moreover, Microsoft Word has a feature which I'm not sure Libra Office has, that is the possibility to start the document where you left off. A nice feature when you're reading a book, and you want to return to the point where you closed the document.
And finally, Microsoft Word is much more dedicated to work with screen readers, that is, you can access each service offered by Word accessibly plus, having different layouts of presenting documents, it helps you better navigate on the document by letting you jump on certain features, such as headings, links, tables, and so on.
That's why I find Microsoft Word to be way better than Libra Office.
Hope this helps.
Cheers!

the spell checker on Libre office sucks accessibility wise, you get no context, and you have to like shift tab to get to the misspelled word. I want MS office too, but I can't afford to buy it, and the whole office 365, i don't think I would use it enough to justify a subscription.

I don't know, I think i heard somewhere that you can select two-three Office applications and buy them. Not sure if this is only for students.

what version of word do you use? 2010? 2013? 2016?

The problem with office 365 is that I don't really see why I should pay Microsoft 40 usd a year for aa storage service I will not use.

As however it turns out likely my lady will also need a copy of office, and I'll need a copy on the windows 10 laptop I will be getting soon, the deal with five licenses might actually work out cheaper in the long run even if I don't intend to use outlook etc.