Actually, it’s a tangible image that we can match with the words.
Here is an example;
Trust - Handshake.
I can’t see trust as an image but I can see a handshake between 2 people, so the words Trust is always a Handshake for me.
Another one;
Beauty - The Beast from the movie Beauty and the Beast. I remember it very well, so it’s the Beast character from the cartoon that reminds me of the word Beauty and I can just imagine that image to remind me of it.
Bravery: Mel Gibson Fighting Very “Bravely” in the movie Brave heart. So Mel Gibson is the image for me for the word Bravery.
Courage - This is a little different, I imagine an Old car which is my old Ford Escort that used to give me all sorts of trouble, it was an old banger.
Cour - Car | age - Old = Old Car (My old Escort).
So my Old Ford Escort is the tangible image I use.
Coldness - Eskimo person | Ice Cubes Nested | A Nurse who is cold and shivering.
Charity - Oxfam is the most famous Charity shop, and the logo of it is my image.
Also, Cha is Tea in many languages, so a Cha Tea could also be a good one to use.
Strength - Muscular Arm
Romance - Rome & Lovers Kissing. The famous Pisa Tower and a couple kissing.
Luck - Shamrock four leaf clover
Victory - V sign with fingers
Wealth - A pile of paper money bills (Stack of dollar bills or any type of money)
I see Bill Gates soon as I see the word Wealth.
Service - Hotel reception Bell.
Customer Service - Headband | Handsfree Headset with a Microphone.
Sleep - Pillow
Memory - Brain
Thought - Hands on my Head
Energy - Albert Einstein (E = Mc2) | Laser beam | Electric Cable
Once we find the matching images, we can then link the two together that makes sense.
Examples;
Violence - Violins.
My nephew is a musician hitting me over the head with his Violin. I hit back with my violin. Some violence there 
Service - Hotel reception Bell.
Imagine you keep hitting the bell at a hote receoption and nobody comes and you keep shouting “Service please, anyone here?”
Coldness - Cold Nurse.
Your Nurse arrives your house cold and shivering and puts on the heat/radiators etc.
Beauty - The Beast is Marrying the Beauty walking down the aisle.
Once we practice these images initially with a mini-story-link a few times, I think then it will just appear as tangible images and we won’t even need the story-link anymore.