diff --git a/docs/landscape.html b/docs/landscape.html
index ab918a77ff..6c0f4cbce8 100644
--- a/docs/landscape.html
+++ b/docs/landscape.html
@@ -64,7 +64,7 @@
       <tr bgcolor="#CCCCCC"><td colspan="2">Only meaningful in tropic climate. It contains the definition of the available zones</td></tr>
       <tr><td style="width: 5em;"><tt>00</tt></td><td>normal</td></tr>
       <tr><td><tt>01</tt></td><td>desert</td></tr>
-      <tr><td><tt>02</tt></td><td>rain forest</td></tr>
+      <tr><td><tt>02</tt></td><td>rainforest</td></tr>
      </table>
      In any other climate these 2 bits are theoretically free of use, however using them does not seem useful.
     </li>
diff --git a/src/industry_cmd.cpp b/src/industry_cmd.cpp
index b46e6e160d..9889aaa5c6 100644
--- a/src/industry_cmd.cpp
+++ b/src/industry_cmd.cpp
@@ -1375,7 +1375,7 @@ static CommandCost CheckNewIndustry_Water(TileIndex tile)
 }
 
 /**
- * Check the conditions of #CHECK_LUMBERMILL (Industry should be in the rain forest).
+ * Check the conditions of #CHECK_LUMBERMILL (Industry should be in the rainforest).
  * @param tile %Tile to perform the checking.
  * @return Succeeded or failed command.
  */
diff --git a/src/industrytype.h b/src/industrytype.h
index ae4316c615..b42dbe3c0f 100644
--- a/src/industrytype.h
+++ b/src/industrytype.h
@@ -38,7 +38,7 @@ enum CheckProc : uint8_t {
 	CHECK_FARM,       ///< %Industry should be below snow-line in arctic.
 	CHECK_PLANTATION, ///< %Industry should NOT be in the desert.
 	CHECK_WATER,      ///< %Industry should be in the desert.
-	CHECK_LUMBERMILL, ///< %Industry should be in the rain forest.
+	CHECK_LUMBERMILL, ///< %Industry should be in the rainforest.
 	CHECK_BUBBLEGEN,  ///< %Industry should be in low land.
 	CHECK_OIL_RIG,    ///< Industries at sea should be positioned near edge of the map.
 	CHECK_END,        ///< End marker of the industry check procedures.
diff --git a/src/table/genland.h b/src/table/genland.h
index 7bc6294ec7..51d983f2be 100644
--- a/src/table/genland.h
+++ b/src/table/genland.h
@@ -5,7 +5,7 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-/** @file genland.h Table used to generate deserts and/or rain forests. */
+/** @file genland.h Table used to generate deserts and/or rainforests. */
 
 #define M(x, y) {x,  y}
 
diff --git a/src/tree_cmd.cpp b/src/tree_cmd.cpp
index 6877e7e2e5..dc41a703e3 100644
--- a/src/tree_cmd.cpp
+++ b/src/tree_cmd.cpp
@@ -442,9 +442,9 @@ CommandCost CmdPlantTree(DoCommandFlag flags, TileIndex tile, TileIndex start_ti
 				if (_settings_game.game_creation.landscape == LandscapeType::Tropic && treetype != TREE_INVALID && (
 						/* No cacti outside the desert */
 						(treetype == TREE_CACTUS && GetTropicZone(current_tile) != TROPICZONE_DESERT) ||
-						/* No rain forest trees outside the rain forest, except in the editor mode where it makes those tiles rain forest tile */
+						/* No rainforest trees outside the rainforest, except in the editor mode where it makes those tiles rainforest tile */
 						(IsInsideMM(treetype, TREE_RAINFOREST, TREE_CACTUS) && GetTropicZone(current_tile) != TROPICZONE_RAINFOREST && _game_mode != GM_EDITOR) ||
-						/* And no subtropical trees in the desert/rain forest */
+						/* And no subtropical trees in the desert/rainforest */
 						(IsInsideMM(treetype, TREE_SUB_TROPICAL, TREE_TOYLAND) && GetTropicZone(current_tile) != TROPICZONE_NORMAL))) {
 					msg = STR_ERROR_TREE_WRONG_TERRAIN_FOR_TREE_TYPE;
 					continue;