Hua bua actually is not synonymous with "spatulate" as I use the latter term. Hua bua has a very small upturned blip at the tip. You need to look closely at the photo on my glossary page & looking at the shadows helps spot it.
"Spatulate," as I use the term, refers to a tip that is completely rounded. The problem is that a hua bua tip can lose the blip trhough wear and/or sharpening. It could well be that what I distinguish as spatulate is actually a worn-down hua bua.
Hua lu guy (lukkai) refers to the tip which has a down-turned back edge, giving the effect of an up-side-down blade (the downward sweep of the back edge is greater than the upward sweep of the keen edge).
And now I'm forgetting what hua pla lod is.
From the context its spatulate.