The ID name of a few blocks, items and entities isn't consistent with the translated name or the ID of another form of that object:

Blocks and items

• mob_spawner should be spawner
  • Consistency with block name, which is more correct as spawners can actually spawn any kind of entity
• melon should be melon_slice
  • Consistency with item name
• speckled_melon should be glistering_melon
  • Consistency with item name
• melon_block should be melon
  • Consistency with block name
• experience_bottle should be xp_bottle
  • Consistency with entity ID name and xp_orb
• prismarine_bricks_slab should be prismarine_brick_slab
  • See MC-126034
• prismarine_bricks_stairs should be prismarine_brick_stairs
  • See MC-126034

Entities

• commandblock_minecart should be{{ command_block_minecart}}
  • Consistency with item ID name
• ender_crystal should be end_crystal
  • Consistency with item ID name
• evocation_illager should be evoker
  • Consistency with entity name
• fireworks_rocket should be firework_rocket
  • Consistency with item ID name
• illusion_illager should be illusioner
  • Consistency with entity name
• snowman should be snow_golem
  • Consistency with entity name
• village_golem should be iron_golem
  • Consistency with entity name
• vindication_illager should be vindicator
  • Consistency with entity name