diff --git a/doc/CK_COHORT_INIT b/doc/CK_COHORT_INIT
index 5f367de..8d1bd4d 100644
--- a/doc/CK_COHORT_INIT
+++ b/doc/CK_COHORT_INIT
@@ -28,7 +28,7 @@
 .Dt CK_COHORT_INIT 3
 .Sh NAME
 .Nm CK_COHORT_INIT
-.Nd Initialize an instance of a cohort type
+.Nd initialize instance of a cohort type
 .Sh LIBRARY
 Concurrency Kit (libck, \-lck)
 .Sh SYNOPSIS
diff --git a/doc/CK_COHORT_INSTANCE b/doc/CK_COHORT_INSTANCE
index ca622a0..bc5a893 100644
--- a/doc/CK_COHORT_INSTANCE
+++ b/doc/CK_COHORT_INSTANCE
@@ -28,7 +28,7 @@
 .Dt CK_COHORT_INSTANCE 3
 .Sh NAME
 .Nm CK_COHORT_INSTANCE
-.Nd Declare an instance of a cohort type
+.Nd declare an instance of a cohort type
 .Sh LIBRARY
 Concurrency Kit (libck, \-lck)
 .Sh SYNOPSIS
diff --git a/doc/CK_COHORT_LOCK b/doc/CK_COHORT_LOCK
index a1e42e5..5e0f594 100644
--- a/doc/CK_COHORT_LOCK
+++ b/doc/CK_COHORT_LOCK
@@ -28,7 +28,7 @@
 .Dt CK_COHORT_LOCK 3
 .Sh NAME
 .Nm CK_COHORT_LOCK
-.Nd Acquire a cohort's locks
+.Nd acquire cohort lock
 .Sh LIBRARY
 Concurrency Kit (libck, \-lck)
 .Sh SYNOPSIS
diff --git a/doc/CK_COHORT_PROTOTYPE b/doc/CK_COHORT_PROTOTYPE
index e8766af..eb70b1e 100644
--- a/doc/CK_COHORT_PROTOTYPE
+++ b/doc/CK_COHORT_PROTOTYPE
@@ -28,7 +28,7 @@
 .Dt CK_COHORT_PROTOTYPE 3
 .Sh NAME
 .Nm CK_COHORT_PROTOTYPE
-.Nd Define a cohort type with the given lock types
+.Nd define cohort type with specified lock types
 .Sh LIBRARY
 Concurrency Kit (libck, \-lck)
 .Sh SYNOPSIS
diff --git a/doc/CK_COHORT_TRYLOCK b/doc/CK_COHORT_TRYLOCK
index 55959df..936a33b 100644
--- a/doc/CK_COHORT_TRYLOCK
+++ b/doc/CK_COHORT_TRYLOCK
@@ -28,7 +28,7 @@
 .Dt CK_COHORT_TRYLOCK 3
 .Sh NAME
 .Nm CK_COHORT_TRYLOCK
-.Nd Try to acquire a cohort's locks
+.Nd try to acquire cohort lock
 .Sh LIBRARY
 Concurrency Kit (libck, \-lck)
 .Sh SYNOPSIS
diff --git a/doc/CK_COHORT_TRYLOCK_PROTOTYPE b/doc/CK_COHORT_TRYLOCK_PROTOTYPE
index 62f3e68..93063ac 100644
--- a/doc/CK_COHORT_TRYLOCK_PROTOTYPE
+++ b/doc/CK_COHORT_TRYLOCK_PROTOTYPE
@@ -28,7 +28,7 @@
 .Dt CK_COHORT_TRYLOCK_PROTOTYPE 3
 .Sh NAME
 .Nm CK_COHORT_TRYLOCK_PROTOTYPE
-.Nd Define a cohort type with the given lock types
+.Nd define cohort type with specified lock types
 .Sh LIBRARY
 Concurrency Kit (libck, \-lck)
 .Sh SYNOPSIS
diff --git a/doc/CK_COHORT_UNLOCK b/doc/CK_COHORT_UNLOCK
index 7dca173..23401c8 100644
--- a/doc/CK_COHORT_UNLOCK
+++ b/doc/CK_COHORT_UNLOCK
@@ -28,7 +28,7 @@
 .Dt CK_COHORT_UNLOCK 3
 .Sh NAME
 .Nm CK_COHORT_UNLOCK
-.Nd Acquire a cohort's locks
+.Nd release cohort lock
 .Sh LIBRARY
 Concurrency Kit (libck, \-lck)
 .Sh SYNOPSIS