Minecraft wiki entry for Death_messages, associated text: <player> hit the ground too hard
Appears when the player is killed by a less than 5 block fall, ender pearl damage, or falling while riding an entity that died due to fall damage.
<player> hit the ground too hard whilst trying to escape <player/mob>
Appears when the player is hurt by a player or mob then killed by either a fall from less than 5 blocks, ender pearl damage, or when riding an entity that died due to fall damage.
<player> fell from a high place
Appears when the player is killed by a greater than 5 block fall.
<player> fell off a ladder
Appears when the player is killed by falling after being on a ladder.
<player> fell off some vines
Appears when the player is killed by falling after being on a vine.
<player> fell off some weeping vines
Appears when the player is killed by falling after being on a weeping vine.
<player> fell off some twisting vines
Appears when the player is killed by falling after being on a twisting vine.
<player> fell off scaffolding
Appears when the player is killed by falling after traversing up or down through scaffolding.
If the player falls from scaffolding that doesn't have scaffolding below it, it just counts as a greater than 5 block fall ("fell from a high place").
<player> fell while climbing
Appears when the player is killed by falling after being on a climbable block that is not one of the aforementioned ones.
Only cave vines fall into this category in the vanilla game, however one can make more blocks climbable using data packs.
Also appears when the player falls from any climbable block, changes dimension before dying, and then dies to fall damage.
This can happen even without the use of data packs.
death.fell.accident.water
Appears when the player dies to fall damage in water, which is ordinarily impossible because water cancels all fall damage.
Currently replicable in 1.13.x-1.18.x by taking fall damage on a waterlogged slab in a minecart, or by having a trident enchanted with an insanely high level of Riptide, then trying to use it inside deep water bodies.
This death message is untranslated due to MC-195467.
Before 1.16, this message was translated as <player> fell out of the water.
<player> was impaled on a stalagmite
Appears when the player falls on a pointed dripstone and dies.
<player> was impaled on a stalagmite whilst fighting <player/mob>
Appears when the player is hurt by a player or mob then falls on a pointed dripstone and dies.