1) Alternative 2) Anti-establishment 3) Disloyal 4) Dissident 5) Insurgent 6) Rebellious 7) Secretive 8) Seditious 9) Treasonable 1) Corday 2) Counterrevolutionist 3) Danton 4) Dynamiter 5) Dynamitist 6) Girondist 7) Guevara 8) Insurgent 9) Insurrectionist 10) Marat 11) Marti 12) Mirabeau 13) Rebellious 14) Revolutionist 15) Robespierre 16) Subverter 17) Trotsky 18) Villa 19) Zapata 
• (a.) Tending to subvert; having a tendency to overthrow and ruin.
Sub·ver'sive adjective [ Confer French subversif .] Tending to subvert; having a tendency to overthrow and ruin. « Lying is a vice subversive of the very ends and design of conversation.» Rogers. 
tending to subvert or advocating subversion, esp. in an attempt to overthrow or cause the destruction of an established or legally constituted government.
[SAT terms] in opposition to an established system or government[PSAT glossary] in opposition to an established system or government