Via Resource Packs
The Item View can be easily modified by adding JSON files to assets/<namespace>/rrv/index. The format is as follows:
aliases: An optional object containing a list of items to associate aliases with.
{"aliases": {"minecraft:enchanting_table": ["enchantment table"],"minecraft:crafting_table": ["workbench"]}}
Via Code
Mods that prefer having dedicated RRV integration can use the ItemView API to add aliases. This is useful when adding aliases in bulk.
ItemView.addAlias(Items.EMERALD, "ruby");ItemView.addAliases(Items.DIAMOND, List.of("ruby", "sapphire"));