diff --git a/src/sanitise/sentance.rs b/src/sanitise/sentance.rs
index dc4ee22..b9df50e 100644
--- a/src/sanitise/sentance.rs
+++ b/src/sanitise/sentance.rs
@@ -13,7 +13,7 @@ use std::{
 #[derive(Debug)]
 pub struct SentanceError;
 
-/// A sentance
+/// A sentence
 #[derive(Debug, PartialEq, Eq)]
 #[repr(transparent)]
 pub struct Sentance(str);
diff --git a/src/sanitise/word.rs b/src/sanitise/word.rs
index 92f639d..36d6250 100644
--- a/src/sanitise/word.rs
+++ b/src/sanitise/word.rs
@@ -68,7 +68,8 @@ impl Word
     }
 
     /// Create a new iterator over words from this sentance.
-    pub fn new_iter<'a>(from: &'a (impl AsRef<Sentance> +?Sized+'a)) -> impl Iterator<Item = &'a Self>
+    pub fn new_iter<'a, 'b>(from: &'a (impl AsRef<Sentance> +?Sized+'b)) -> impl Iterator<Item = &'a Self>
+	where 'b: 'a
     {
 	let from = from.as_ref();
 	from.split_inclusive(is_word_boundary)