Contractible collectibles There’s a very small set of words which you can spell with either -able or -ible, such as extendable and extendible: both mean ‘able to be extended’ and both endings are acceptable. Any good dictionary will provide both spellings if they are equally correct. Sometimes, the different spelling relates to a different meaning: it’s therefore especially important to pick the right ending. For instance, contractable means that a disease is able to be contracted (or caught): The virus is highly contractable. while contractible means that something is capable of contracting (becoming smaller): A container having a contractible body for storing a liquid is provided. As you can see from these examples, a container would never be contractable! Finally, collectable is an interesting case. It can be an adjective and a noun and both can be spelled collectible. As an adjective, collectable has two meanings. The spelling collectable is usually used to mean ‘able to be collected’: The board reckons another $2.4 million is collectable, to be dished out to shareholders over the next three years. whereas the spelling collectible is usually means ‘worth collecting; interesting to collectors’: He was also an accomplished driver, and an expert on antique and collectible toys.