Definitions
Loner is a noun that refers to a person who prefers to be alone and does not often associate with others.
Example
He was always a bit of a loner, preferring to spend his free time reading.
Example
She's not a loner by choice, but she finds it difficult to make friends.
Loaner is a noun that refers to something that is temporarily given to someone to use while their own is being repaired or serviced.
Example
The dealership gave me a loaner car while mine was in the shop.
Example
I borrowed a loaner laptop from the IT department while mine was being fixed.
Tips To Remember the Differences
Here are a few tips to easily distinguish the difference between these words while keeping in mind the description we've provided:
To remember the difference between loner and loaner, you could think of loner as someone who is 'alone', while loaner is something that is 'loaned' to you temporarily.
Remember this!
Remember, a loner is a person who prefers to be alone, while a loaner is something that is temporarily given to you to use.