diff -r 939fa8d8663e -r b188eae2c092 java/dictionary-generator/src/cz/frantovo/telco/dictionary/SynonymsEntry.java
--- a/java/dictionary-generator/src/cz/frantovo/telco/dictionary/SynonymsEntry.java	Tue Jul 09 22:41:49 2013 +0200
+++ b/java/dictionary-generator/src/cz/frantovo/telco/dictionary/SynonymsEntry.java	Tue Jul 09 22:42:32 2013 +0200
@@ -17,14 +17,51 @@
  */
 package cz.frantovo.telco.dictionary;
 
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+
 /**
  *
  * @author Ing. František Kučera (frantovo.cz)
  */
 public class SynonymsEntry implements Comparable<SynonymsEntry> {
 
+	private IndexEntry base;
+	private String name;
+
+	public SynonymsEntry(IndexEntry base, String name) {
+		this.base = base;
+		this.name = name;
+	}
+
+	public void serialize(DataOutputStream synonymOutputStream) throws IOException {
+		synonymOutputStream.write(name.getBytes(StandardCharsets.UTF_8));
+		synonymOutputStream.write(0);
+		synonymOutputStream.writeInt((int) base.getOrdinal()); // unsigned int 32
+	}
+
 	@Override
 	public int compareTo(SynonymsEntry o) {
-		throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+		int nameDiff = name.compareTo(o.name);
+		if (nameDiff == 0) {
+			return base.compareTo(o.base);
+		} else {
+			return nameDiff;
+		}
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		return o instanceof IndexEntry && compareTo((SynonymsEntry) o) == 0;
+	}
+
+	@Override
+	public int hashCode() {
+		int hash = 3;
+		hash = 47 * hash + Objects.hashCode(this.base);
+		hash = 47 * hash + Objects.hashCode(this.name);
+		return hash;
 	}
 }