Thanks all. I've been sent a link to a Suffix Dictionary but what I actually need would be the same thing in reverse, as it's much too big to sift through: one wouldn't flick through a normal dictionary, starting from A, to find out what the black-and-white stripy horse is called, eh?

By the way, I'm quite prepared to invent a word for it, if that's necessary. I've been pondering on this for some time - at one time I thought the suffix might be '-mach', but a) I can't remember why and b) I recall deciding that'd be wrong.

Someone better educated than I am (that'd be most people) tells me that I need to find someone well versed in Greek.... but I fear that Archaic Greek might be nearer the mark.

Thanks anyway

S the B