diff --git a/mods/beds/api.lua b/mods/beds/api.lua
index d640a311118782001f01ec78217ccf8257cf384b..3624ea45cc382ae0aab3ad1da2e4aae97b1ac3ae 100644
--- a/mods/beds/api.lua
+++ b/mods/beds/api.lua
@@ -59,8 +59,8 @@ function beds.register_bed(name, def)
 				return itemstack
 			end
 
-			local def = minetest.registered_nodes[minetest.get_node(pos).name]
-			if not def or not def.buildable_to then
+			local node_def = minetest.registered_nodes[minetest.get_node(pos).name]
+			if not node_def or not node_def.buildable_to then
 				return itemstack
 			end
 
@@ -113,8 +113,8 @@ function beds.register_bed(name, def)
 			end
 			local newp = vector.add(pos, minetest.facedir_to_dir(new_param2))
 			local node3 = minetest.get_node_or_nil(newp)
-			local def = node3 and minetest.registered_nodes[node3.name]
-			if not def or not def.buildable_to then
+			local node_def = node3 and minetest.registered_nodes[node3.name]
+			if not node_def or not node_def.buildable_to then
 				return false
 			end
 			if minetest.is_protected(newp, user:get_player_name()) then
diff --git a/mods/creative/init.lua b/mods/creative/init.lua
index 5ea8d195f72ea2123c0631782efd71c53149540f..3b0076c1908cea071bb462cdc12d70081de8df52 100644
--- a/mods/creative/init.lua
+++ b/mods/creative/init.lua
@@ -5,15 +5,16 @@ local player_inventory = {}
 local creative_mode = minetest.setting_getbool("creative_mode")
 
 -- Create detached creative inventory after loading all mods
-creative.init_creative_inventory = function(player)
-	local player_name = player:get_player_name()
-	player_inventory[player_name] = {}
-	player_inventory[player_name].size = 0
-	player_inventory[player_name].filter = ""
-	player_inventory[player_name].start_i = 1
-	player_inventory[player_name].tab_id = 2
+creative.init_creative_inventory = function(owner)
+	local owner_name = owner:get_player_name()
+	player_inventory[owner_name] = {
+		size = 0,
+		filter = "",
+		start_i = 1,
+		tab_id = 2,
+	}
 
-	minetest.create_detached_inventory("creative_" .. player_name, {
+	minetest.create_detached_inventory("creative_" .. owner_name, {
 		allow_move = function(inv, from_list, from_index, to_list, to_index, count, player)
 			if creative_mode and not to_list == "main" then
 				return count
@@ -45,7 +46,7 @@ creative.init_creative_inventory = function(player)
 		end,
 	})
 
-	creative.update_creative_inventory(player_name)
+	creative.update_creative_inventory(owner_name)
 	--print("creative inventory size: " .. player_inventory[player_name].size)
 end
 
diff --git a/mods/doors/init.lua b/mods/doors/init.lua
index f39cedff38018248ffa415386ce15d2d9a97c62c..7e587dcf7188f6987320312a0c624d4efce5fa3a 100644
--- a/mods/doors/init.lua
+++ b/mods/doors/init.lua
@@ -344,11 +344,11 @@ function doors.register(name, def)
 			return true
 		end
 		local meta = minetest.get_meta(pos)
-		local name
+		local owner_name
 		if digger then
-			name = digger:get_player_name()
+			owner_name = digger:get_player_name()
 		end
-		return meta:get_string("doors_owner") == name
+		return meta:get_string("doors_owner") == owner_name
 	end
 
 	if not def.sounds then
diff --git a/mods/fire/init.lua b/mods/fire/init.lua
index 08b53a89dfed3c237209cabfa8003d018c1c00eb..90e2f0a8700c780388491861a585e36184cdbd89 100644
--- a/mods/fire/init.lua
+++ b/mods/fire/init.lua
@@ -284,8 +284,8 @@ else
 			local p = minetest.find_node_near(p0, 1, {"group:flammable"})
 			if p then
 				-- remove flammable nodes around flame
-				local node = minetest.get_node(p)
-				local def = minetest.registered_nodes[node.name]
+				local flammable_node = minetest.get_node(p)
+				local def = minetest.registered_nodes[flammable_node.name]
 				if def.on_burn then
 					def.on_burn(p)
 				else
diff --git a/mods/tnt/init.lua b/mods/tnt/init.lua
index a356fb1777759f081f2420a0398d311c4738217d..4a704cc46d4b0d320b8b2845e85f98c8773c73a9 100644
--- a/mods/tnt/init.lua
+++ b/mods/tnt/init.lua
@@ -7,7 +7,7 @@ local loss_prob = {}
 loss_prob["default:cobble"] = 3
 loss_prob["default:dirt"] = 4
 
-local radius = tonumber(minetest.setting_get("tnt_radius") or 3)
+local tnt_radius = tonumber(minetest.setting_get("tnt_radius") or 3)
 
 -- Fill a list with data for content IDs, after all nodes are registered
 local cid_data = {}
@@ -342,10 +342,10 @@ local function tnt_explode(pos, radius, ignore_protection, ignore_on_blast)
 	end
 	end
 
-	for _, data in ipairs(on_blast_queue) do
-		local dist = math.max(1, vector.distance(data.pos, pos))
+	for _, queued_data in ipairs(on_blast_queue) do
+		local dist = math.max(1, vector.distance(queued_data.pos, pos))
 		local intensity = (radius * radius) / (dist * dist)
-		local node_drops = data.on_blast(data.pos, intensity)
+		local node_drops = queued_data.on_blast(queued_data.pos, intensity)
 		if node_drops then
 			for _, item in ipairs(node_drops) do
 				add_drop(drops, item)
@@ -586,6 +586,6 @@ end
 tnt.register_tnt({
 	name = "tnt:tnt",
 	description = "TNT",
-	radius = radius,
+	radius = tnt_radius,
 })