diff --git a/CHANGELOG.md b/CHANGELOG.md
index fdb2ec9..f0255ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,8 @@
 # Unreleased
+- Rename plural methods
+    - src/actor.rs set_streams -> set_stream, add_streams -> add_stream
+    - src/collections.rs set_items -> set_item, add_items -> add_item
+    - src/object.rs set_replies -> set_reply, add_replies -> add_reply
 
 # 0.7.0-alpha.3
 - Add `.into_parts()` for some types where it makes sense
diff --git a/src/actor.rs b/src/actor.rs
index f7eeef8..0f49e19 100644
--- a/src/actor.rs
+++ b/src/actor.rs
@@ -581,7 +581,7 @@ pub trait ApActorExt<Inner>: AsApActor<Inner> {
     /// # let mut person = ApActor::new(context(), Person::new());
     /// use activitystreams::prelude::*;
     ///
-    /// person.set_streams(uri!("https://example.com/liked"));
+    /// person.set_stream(uri!("https://example.com/liked"));
     /// # Ok(())
     /// # }
     /// ```
@@ -632,7 +632,7 @@ pub trait ApActorExt<Inner>: AsApActor<Inner> {
     /// # fn main() -> Result<(), anyhow::Error> {
     /// # use activitystreams::{actor::{ApActor, Person}, context};
     /// # let mut person = ApActor::new(context(), Person::new());
-    /// # person.set_id(context()).add_streams(context()).add_streams(context());
+    /// # person.set_id(context()).add_stream(context()).add_stream(context());
     /// use activitystreams::prelude::*;
     ///
     /// if let Some(streams) = person.streams()? {
@@ -719,11 +719,11 @@ pub trait ApActorExt<Inner>: AsApActor<Inner> {
     /// # let mut person = ApActor::new(context(), Person::new());
     /// use activitystreams::prelude::*;
     ///
-    /// person.set_streams(uri!("https://example.com/streams"));
+    /// person.set_stream(uri!("https://example.com/streams"));
     /// # Ok(())
     /// # }
     /// ```
-    fn set_streams(&mut self, streams: Url) -> &mut Self {
+    fn set_stream(&mut self, streams: Url) -> &mut Self {
         self.ap_actor_mut().streams = Some(streams.into());
         self
     }
@@ -762,12 +762,12 @@ pub trait ApActorExt<Inner>: AsApActor<Inner> {
     /// use activitystreams::prelude::*;
     ///
     /// person
-    ///     .add_streams(uri!("https://example.com/streams1"))
-    ///     .add_streams(uri!("https://example.com/streams2"));
+    ///     .add_stream(uri!("https://example.com/streams1"))
+    ///     .add_stream(uri!("https://example.com/streams2"));
     /// # Ok(())
     /// # }
     /// ```
-    fn add_streams(&mut self, stream: Url) -> &mut Self {
+    fn add_stream(&mut self, stream: Url) -> &mut Self {
         let v = match self.ap_actor_mut().streams.take() {
             Some(mut v) => {
                 v.add(stream);
@@ -800,7 +800,7 @@ pub trait ApActorExt<Inner>: AsApActor<Inner> {
     /// # fn main() -> Result<(), anyhow::Error> {
     /// # use activitystreams::{actor::{ApActor, Person}, context, uri};
     /// # let mut person = ApActor::new(context(), Person::new());
-    /// # person.set_streams(uri!("https://example.com/streams"));
+    /// # person.set_stream(uri!("https://example.com/streams"));
     /// use activitystreams::prelude::*;
     ///
     /// assert!(person.streams_unchecked().is_some());
diff --git a/src/collection.rs b/src/collection.rs
index 46f5c55..6511d12 100644
--- a/src/collection.rs
+++ b/src/collection.rs
@@ -12,7 +12,7 @@
 //! let mut collection = OrderedCollection::new();
 //!
 //! collection
-//!     .set_items(uri!("https://example.com/notes/1234"))
+//!     .set_item(uri!("https://example.com/notes/1234"))
 //!     .set_total_items(1u64)
 //!     .set_current(uri!("https://example.com/notes/1234"))
 //!     .set_first(uri!("https://example.com/notes/1234"))
@@ -107,11 +107,11 @@ pub trait CollectionExt<Kind>: AsCollection<Kind> {
     /// # use activitystreams::{collection::UnorderedCollection, uri};
     /// # let mut collection = UnorderedCollection::new();
     ///
-    /// collection.set_items(uri!("https://example.com"));
+    /// collection.set_item(uri!("https://example.com"));
     /// # Ok(())
     /// # }
     /// ```
-    fn set_items<T>(&mut self, item: T) -> &mut Self
+    fn set_item<T>(&mut self, item: T) -> &mut Self
     where
         T: Into<AnyBase>,
     {
@@ -157,12 +157,12 @@ pub trait CollectionExt<Kind>: AsCollection<Kind> {
     /// # let mut collection = UnorderedCollection::new();
     ///
     /// collection
-    ///     .add_items(uri!("https://example.com/one"))
-    ///     .add_items(uri!("https://example.com/two"));
+    ///     .add_item(uri!("https://example.com/one"))
+    ///     .add_item(uri!("https://example.com/two"));
     /// # Ok(())
     /// # }
     /// ```
-    fn add_items<T>(&mut self, item: T) -> &mut Self
+    fn add_item<T>(&mut self, item: T) -> &mut Self
     where
         T: Into<AnyBase>,
     {
@@ -196,7 +196,7 @@ pub trait CollectionExt<Kind>: AsCollection<Kind> {
     /// ```rust
     /// # use activitystreams::{context, collection::UnorderedCollection};
     /// # let mut collection = UnorderedCollection::new();
-    /// # collection.set_items(context());
+    /// # collection.set_item(context());
     /// use activitystreams::prelude::*;
     ///
     /// assert!(collection.items().is_some());
diff --git a/src/object.rs b/src/object.rs
index 9831e16..76cedd4 100644
--- a/src/object.rs
+++ b/src/object.rs
@@ -2147,11 +2147,11 @@ pub trait ObjectExt<Kind>: AsObject<Kind> {
     /// # use activitystreams::{object::Video, uri};
     /// # let mut video = Video::new();
     ///
-    /// video.set_replies(uri!("https://example.com"));
+    /// video.set_reply(uri!("https://example.com"));
     /// # Ok(())
     /// # }
     /// ```
-    fn set_replies<T>(&mut self, replies: T) -> &mut Self
+    fn set_reply<T>(&mut self, replies: T) -> &mut Self
     where
         T: Into<AnyBase>,
     {
@@ -2197,12 +2197,12 @@ pub trait ObjectExt<Kind>: AsObject<Kind> {
     /// # let mut video = Video::new();
     ///
     /// video
-    ///     .add_replies(uri!("https://example.com/one"))
-    ///     .add_replies(uri!("https://example.com/two"));
+    ///     .add_reply(uri!("https://example.com/one"))
+    ///     .add_reply(uri!("https://example.com/two"));
     /// # Ok(())
     /// # }
     /// ```
-    fn add_replies<T>(&mut self, replies: T) -> &mut Self
+    fn add_reply<T>(&mut self, replies: T) -> &mut Self
     where
         T: Into<AnyBase>,
     {
@@ -2239,7 +2239,7 @@ pub trait ObjectExt<Kind>: AsObject<Kind> {
     /// # fn main() -> Result<(), anyhow::Error> {
     /// # use activitystreams::{object::Video, uri};
     /// # let mut video = Video::new();
-    /// # video.set_replies(uri!("https://example.com"));
+    /// # video.set_reply(uri!("https://example.com"));
     /// #
     /// use activitystreams::prelude::*;
     ///