Collectible
This word acts as both as adjective and a noun.
As an adjective: collectable (with the -able suffix) means something like a hire car that you can collect upon your arrival at the airport.
As a noun: collectible (with the -ible suffix) it becomes the object (of value) and is sought by the collectors. We would think of coins, stamps, toys and books as collectibles
Example of using it in a sentence "This book is highly collectible because it is a rare first addition, which was also signed by the author on the day it was published."
This word comes from the Latin word meaning to gather together in one place.
Spelling tip: It is a simple case of adding the correct suffix to the root word here
collect + ible
Use the word as many times throughout the week. This can be verbally, in your written work or listen out for other people using it.