On the contrary, we are talking about three different words in three different languages that mean three very different things. The fact that they are spelled the same does not make them the same word. You might as well say that lead (verb) and lead (noun) are the same word because they look the same on the page.
It's quite a bit more than spelling, although the intent does vary. Anyway, without even going there it's clear historically that "Aikido" was not a word invented by Ueshiba, or even unique to him, even in Japan, which was my point.