Chuck I had hoped you would have gone on to explain why we use the various names but perhaps the person with authority here would be Prof Goldsbury... If he care to pop in that is
I see I did not answer your question in my previous post. I have nothing really to add to what Chuck has stated. It is well known that Morihei Ueshiba largely did not use names for waza, but numbers with counters, as in ikkajou
(一箇条, 二箇条). The names used in the Aikikai were coined by his students, who became teachers, with the result that a rough consensus has more or less developed. It never ceases to amaze me that my Japanese students here in Hiroshima, who are native speakers of the language, have no more clue what, e.g., sumi-otoshi or tai-otoshi means than the Americans (with zero Japanese) who trained with me in the Boston dojo.