diff --git a/doc/source/admin/aggregates.rst b/doc/source/admin/aggregates.rst
index 5b271a69c64f..bb60a9618066 100644
--- a/doc/source/admin/aggregates.rst
+++ b/doc/source/admin/aggregates.rst
@@ -25,7 +25,7 @@ per-aggregate basis by setting the desired ``xxx_weight_multiplier`` aggregate
 metadata.
 
 Administrators are able to optionally expose a host aggregate as an
-:term:`availability zone`. Availability zones are different from host
+:term:`Availability Zone`. Availability zones are different from host
 aggregates in that they are explicitly exposed to the user, and hosts can only
 be in a single availability zone. Administrators can configure a default
 availability zone where instances will be scheduled when the user fails to
diff --git a/doc/source/admin/configuration/schedulers.rst b/doc/source/admin/configuration/schedulers.rst
index 219870f93327..1e832ccfee94 100644
--- a/doc/source/admin/configuration/schedulers.rst
+++ b/doc/source/admin/configuration/schedulers.rst
@@ -24,7 +24,7 @@ By default, the scheduler ``driver`` is configured as a filter scheduler, as
 described in the next section. In the default configuration, this scheduler
 considers hosts that meet all the following criteria:
 
-* Are in the requested :term:`availability zone` (``AvailabilityZoneFilter``).
+* Are in the requested :term:`Availability Zone` (``AvailabilityZoneFilter``).
 
 * Can service the request (``ComputeFilter``).
 
diff --git a/doc/source/reference/glossary.rst b/doc/source/reference/glossary.rst
index b45ec11ccd58..304467e908d6 100644
--- a/doc/source/reference/glossary.rst
+++ b/doc/source/reference/glossary.rst
@@ -33,7 +33,7 @@ Glossary
 
     Host Aggregate
         Host aggregates can be regarded as a mechanism to further partition an
-        :term:`availability zone`; while availability zones are visible to
+        :term:`Availability Zone`; while availability zones are visible to
         users, host aggregates are only visible to administrators. Host
         aggregates provide a mechanism to allow administrators to assign
         key-value pairs to groups of machines. Each node can have multiple