diff --git a/strcase/opt.go b/strcase/opt.go
index 31e5366..5165fe0 100644
--- a/strcase/opt.go
+++ b/strcase/opt.go
@@ -1,5 +1,7 @@
 package strcase
 
+import "sort"
+
 // A CaseConverter converts a string to a specific case.
 type CaseConverter interface {
 	Convert(string) string
@@ -31,6 +33,10 @@ type CaseOpts struct {
 // UsingVocab sets the vocab for the CaseConverter.
 func UsingVocab(vocab []string) CaseOptFunc {
 	return func(opts *CaseOpts) {
+		// NOTE: This is required to ensure that we have greedy alternation.
+		sort.Slice(vocab, func(p, q int) bool {
+			return len(vocab[p]) > len(vocab[q])
+		})
 		opts.vocab = vocab
 	}
 }
diff --git a/strcase/sentence_test.go b/strcase/sentence_test.go
index 525dd75..3e4e86d 100644
--- a/strcase/sentence_test.go
+++ b/strcase/sentence_test.go
@@ -22,6 +22,7 @@ var vocabCases = []testCase{
 	{"Configuration", "Configuration"},
 	{"Six NASA Instruments Will Fly to Moon on Intuitive Machines Lander", "Six NASA instruments will fly to Moon on intuitive machines lander"},
 	{"b. Next title text", "b. Next title text"},
+	{"Axon Server connection", "Axon Server connection"},
 }
 
 func TestSentence(t *testing.T) {
@@ -43,6 +44,8 @@ func TestVocab(t *testing.T) {
 			"[Cc]onfig",
 			"NASA",
 			"Moon",
+			"Axon",
+			"Axon Server",
 		}),
 		strcase.UsingPrefix(`^[a-z]\.\s`))