Hey Vitor,
Thanks for the note. I did search for both SYN and Big Huge Thesaurus and came up empty. Were you able to find something that way?
I also tried joining the packal.org page to message the creator directly but their sign in procedure failed (and I emailed their support).
AND (I don't believe it's not obvious) the workflow in packal.org is titled Big Huge Thesaurus and uses the shortcut SYN
http://www.packal.org/workflow/big-huge-thesaurus