diff --git a/lua/user_api/types/user/util.lua b/lua/user_api/types/user/util.lua
index 3612dd1..3e72626 100644
--- a/lua/user_api/types/user/util.lua
+++ b/lua/user_api/types/user/util.lua
@@ -33,15 +33,16 @@ require('user_api.types.user.autocmd')
 ---@class User.Util.Notify
 ---@field notify fun(msg: string, lvl: NotifyLvl|VimNotifyLvl?, opts: NotifyOpts?)
 
+---@class User.Util.String.Alphabet.Vowels
+---@field upper_map { ['A']: 'A', ['E']: 'E', ['I']: 'I', ['O']: 'O', ['U']: 'U' }
+---@field lower_map { ['a']: 'a', ['e']: 'e', ['i']: 'i', ['o']: 'o', ['u']: 'u' }
+
 ---@class User.Util.String.Alphabet
 ---@field upper_list string[]
 ---@field lower_list string[]
 ---@field upper_map table<string, string>
 ---@field lower_map table<string, string>
-
----@class User.Util.String.Vowels: User.Util.String.Alphabet
----@field upper_map { ['A']: 'A', ['E']: 'E', ['I']: 'I', ['O']: 'O', ['U']: 'U' }
----@field lower_map { ['a']: 'a', ['e']: 'e', ['i']: 'i', ['o']: 'o', ['u']: 'u' }
+---@field vowels User.Util.String.Alphabet.Vowels
 
 ---@class User.Util.String.Digits
 ---@field all table<string, string>
@@ -52,7 +53,6 @@ require('user_api.types.user.autocmd')
 
 ---@class User.Util.String
 ---@field alphabet User.Util.String.Alphabet
----@field vowels User.Util.String.Vowels
 ---@field digits User.Util.String.Digits
 ---@field capitalize fun(s: string, use_dot: boolean?, triggers: string[]?): (new_str: string)
 
diff --git a/lua/user_api/util/string.lua b/lua/user_api/util/string.lua
index 538416c..b351fbc 100644
--- a/lua/user_api/util/string.lua
+++ b/lua/user_api/util/string.lua
@@ -120,29 +120,29 @@ M.alphabet.lower_map = {
 }
 
 ---@diagnostic disable-next-line:missing-fields
-M.vowels = {}
-M.vowels.upper_list = {
+M.alphabet.vowcals = {}
+M.alphabet.vowcals.upper_list = {
     'A',
     'E',
     'I',
     'O',
     'U',
 }
-M.vowels.lower_list = {
+M.alphabet.vowcals.lower_list = {
     'a',
     'e',
     'i',
     'o',
     'u',
 }
-M.vowels.upper_map = {
+M.alphabet.vowcals.upper_map = {
     A = 'A',
     E = 'E',
     I = 'I',
     O = 'O',
     U = 'U',
 }
-M.vowels.lower_map = {
+M.alphabet.vowcals.lower_map = {
     a = 'a',
     e = 'e',
     i = 'i',