Well, I'd never heard of a
spork, but I have heard of a
splade, also written
splayd, which combines a spoon and a blade - but actually it also has fork-like tines (to use a frequent Chi-word). And in researching this topic, I see also a reference to a
foon, which is just another word for a
spork.
Such implements can also be called
runcible spoons, although there was no such thing when Edward Lear invented the word: the phrase was first applied to a spoon with prongs years later, in 1926.
Spork is said to be a trademark, and dictionaries tend to write it with a capital
S. But it's very easy to find lots of examples on the Web of people writing it in all lower-case letters, including on
The Spork FAQ page.
The
splayd was invented in Australia, which is no doubt why they're better known here than sporks. It seems that
Splayd is also a brand name, but it is often written with a lower-case
S, even on the
website of the people selling them. The Powerhouse Museum has
a page on the history of the splayd. However, the
Macquarie Dictionary has an entry for
splade, but not for
splayd, and the
Wiktionary has examples of the word
splade being used in books.
So it seems to me that
spork,
splayd and
splade probably all qualify. (
Runcible is already in the word list.) But as for
foon - well I'm afraid that doesn't cut it.