The selection of fonts you see when using Microsoft Word exist as part of your computers operating system. That is to say these are typefaces that have been loaded or installed onto your computer. Some of the typeface choices you see came with the operating system, others as part of Microsoft office or other installed applications. You may have purchased a single font or a whole typeface family and installed it as well.
A typewriter used a fixed typewriter pitch vs the modern fonts in todays typography. Each typewriter fixed pitch font requires the same amount of space – an “I” takes up the same width as an “M” as an“O” as the “J”
Metal, Photographic typesetting, and Digital typesetting Fonts are proportionally spaced — each letter is designed with as much space as needed for appearance and legibility.
Fonts such as Courier or Courier New are likely a fixed width or mono-spaced font. Fonts that appear to be “typewriter fonts” and are in some classification systems called slab serif fonts, many are also one of your computers system fonts (Courier New, Monaco, Lucdia, Andale Mono) are the fixed font flavor, but that is not always the case.
If the font has “Mono” as part of its name you can be confident it is a fixed width or Mono-spaced font. One other check is use a Type Weight Comparison, that has several typeface specimen set in same point size, set solid, that has same number of characters in each of three different sentence. If it is a mono-spaced font the sentences would take same space, if proportional they will obviously show different line lengths.
So you can see difference in top three and bottom three Type samples line lengths, you know the top three are some examples of mono-spaced or fixed width fonts. The two specimen American Typewriter and Chaparral Pro Bold, both slab serif, both look similar or appear as “typewriter fonts” but are proportional fonts.
Some fixed width or mono-space fonts starting with slab serif then serif then san serif not already mentioned are:
Tex Gyre Cursor
Fira Mono Droid Sans Mono
Bitstream Vera Sans Mono
These are just some, not endorsing or promoting, you just have to try them in your design, lot of others you can check and test out too.