18 four-letter non-words (stuff like "ejeg" and "nanw") and a password that I wrote down back in, must've been around 2012-2013.
BIP32 (mnemonic code) got proposed 2013-09-10. Unfortunately i am not familiar with such kind of a seed. Especially not from 2012/2013.
It might be a modification of BIP32 with a custom word list ? But i guess you would remember if you would have used something
uncommon to backup your coins?
I don't currently have access to the hard-drive with the wallet file on it, but I think it was a Bitcoin Core wallet.
Core did not (and still doesn't) use a mnemonic code to backup the private keys.
If you have got these words from your wallet as a backup, then you didn't use core.
Is there any way I can get my wallet back from this information?
Only if you know what kind of a seed it is and how to derive the necessary information.
The hard drive is still accessible, but it's at my parent's house in another state.
If you have really used core, all you need to do is to copy the
wallet.dat file and move it to a fresh install on another computer.
I would suggest to first make an exact(!) copy of this drive. Then only work on the image of the drive.
Depending on the amount of bitcoins stored in this wallet, you don't want to risk anything which could lead to a loss of your funds.
Accessing the drive could clear up any doubts regarding the wallet you have used.
This seems to be the best way without knowing which wallet used this type of a seed.