We don't have synonyms for relevent yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are element, referent and eleven.
"{{quote-news|year=1973|date=December 20|title=Hansen says Christmas time for thanks, hope|work=The Aberdeen Times|url=http://news.google.com/newspapers?id=z6gMAAAAIBAJ&sjid=f2MDAAAAIBAJ&pg=6403,1843672&dq=relevant"
"{{quote-news|year=1973|date=December 20|title=Hansen says Christmas time for thanks, hope|work=The Aberdeen Times|url=http://news.google.com/newspapers?id=z6gMAAAAIBAJ&sjid=f2MDAAAAIBAJ&pg=6403,1843672&dq=relevant"