I was just looking at a Zulu word entry in Wiktionary that implied it was made from a prefix and a suffix, but there was nothing between them.
Now this could just be sloppy editing of Wiktionary but either way it got me thinking about whether this is a valid word-formation strategy used by any languages.
When I first asked this question I didn't word it in a way that clarified I was asking about word formation. It turns out there are words in several languages which can be analysed on the furface into only affixes, but the examples so far were not originally formed that way, but my more complex processes of adding and dropping morphemes at various stages.
So is this affix-only manner of word formation known to occur? Is it widespread amongst languages?