diff --git a/README.adoc b/README.adoc
index b785ac6..f65fb24 100644
--- a/README.adoc
+++ b/README.adoc
@@ -31,8 +31,13 @@ url = "tcp://app.example.com:12345"
 check_type = "Tcp"
 ----
 
-The value for `interval` can be set by using plain seconds or using units of `h`, `m` and `s`. Unparseable values will
-default to 60 seconds.
+The value for `interval` can be set by using plain seconds or using units. Accepted units:
+
+* h, hour, hours
+* m, min, mins, minutes, minutes
+* s, sec, secs, second, seconds
+
+Unparseable values will default to 60 seconds.
 
 ----
 # Update interval using seconds as number.
diff --git a/src/config.rs b/src/config.rs
index 887235c..e84219e 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -107,9 +107,9 @@ where
 
 fn parse_duration(value: &str) -> Option<Duration> {
     let mut duration_in_secs = 0;
-    if let Ok(re) =
-        Regex::new(r"^((?P<hours>\d+)h\s*)?((?P<minutes>\d+)m\s*)?((?P<seconds>\d+)s?\s*)?$")
-    {
+    if let Ok(re) = Regex::new(
+        r"^((?P<hours>\d+)(h|hour|hours)\s*)?((?P<minutes>\d+)(m|min|mins|minute|minutes)\s*)?((?P<seconds>\d+)(s|sec|secs|second|seconds)?\s*)?$",
+    ) {
         if re.is_match(value) {
             let parts = re.captures_iter(value).next().unwrap();
             if let Some(hours) = parts.name("hours") {
@@ -222,18 +222,51 @@ mod tests {
         assert_eq!(config.checks.len(), 0);
     }
 
+    macro_rules! multi_assert_eq {
+        ($f:expr, $expected:expr, $ ( $left:expr ), + ) => {
+            $(
+                 assert_eq!($f($left), $expected, $left);
+            )+
+        };
+    }
+
     #[test]
     fn test_should_parse_durations() {
         assert_eq!(parse_duration("1m30s"), Some(Duration::from_secs(90)));
         assert_eq!(parse_duration("2m"), Some(Duration::from_secs(120)));
-        assert_eq!(parse_duration("1h1m1s"), Some(Duration::from_secs(3661)));
         assert_eq!(parse_duration("90"), Some(Duration::from_secs(90)));
+
+        multi_assert_eq!(
+            parse_duration,
+            Some(Duration::from_secs(3661)),
+            "1h1m1s",
+            "1hour1min1s",
+            "1hour1mins1s",
+            "1hour1minute1sec",
+            "1hour1minute1secs",
+            "1hour1minutes1second",
+            "1hour1minutes1seconds",
+            "1hours1minutes1seconds"
+        );
     }
 
     #[test]
     fn test_should_parse_durations_with_whitespaces() {
         assert_eq!(parse_duration("1m 30s"), Some(Duration::from_secs(90)));
         assert_eq!(parse_duration("1h 1m 1s"), Some(Duration::from_secs(3661)));
+
+        multi_assert_eq!(
+            parse_duration,
+            Some(Duration::from_secs(3661)),
+            "1h 1m 1s",
+            "1hour 1min 1s",
+            "1hour 1mins 1s",
+            "1hour 1minute 1sec",
+            "1hour 1minute 1secs",
+            "1hour 1minutes 1second",
+            "1hour 1minutes 1seconds",
+            "1hours 1minutes 1seconds"
+        );
     }
 
     #[test]