This plugin provides NGramSynonymTokenizer.
'org.codelibs:elasticsearch-analysis-synonym:1.4.2'
<dependency>
<groupId>org.codelibs</groupId>
<artifactId>elasticsearch-analysis-synonym</artifactId>
<version>1.4.2</version>
</dependency>
<dependency org="org.codelibs" name="elasticsearch-analysis-synonym" rev="1.4.2"/>
"org.codelibs", "elasticsearch-analysis-synonym", "1.4.2"