Is there a way to get the font on my phone onto my tablet? I have a Galaxy S5, and it has a built in font called "UDRGothic". I think it's near perfect for mobile use, and so I want to also have it on my Galaxy Tab A 10.1 tablet.

It doesn't seem to be available by default on my tablet, so of course, I Googled it, but all that came up with was a link to some page that describes an associated APK file, but doesn't seem to have a download option. If I try a more nuanced Google search, I get tons of options for various Gothic fonts, but none are the font I'm looking for.

Is this font only for use with my phone, or can I maybe copy it from my phone to my tablet, or get it some other way?
A pre-answer note, I'm typing in the mobile Stack Exchange app, so please excuse any spelling errors.

Yes, there is a way, but it requires your tablet to be rooted.

As with most things, go ahead and take a backup of both devices, you never know what could go wrong.

OK, lets begin!
In a file manager of your choice, head into /system/fonts, on the device that has the font you like. This does not require root, because your are only reading from that file, not writing. 

Find out a way to copy the font file to your tablet. I would recommend just emailing the font file to yourself, and downloading it from the email onto the tablet.

Now on the tablet, rename that font file to something memorable, like goodfont.ttf. You are going to have to sacrifice the current font, or you can take a backup of the default font file. (If I'm correct I believe it's Roboto-Regular.ttf, but it might be different on yours.)

Now copy goodfont.ttf into /system/fonts (remember, this is on the tablet), and rename it goodfont.ttf to [default font name here].ttf.

Hope I was helpful!