We don't have synonyms for antinational yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are antirational, anti-national and intonational.
(adj) :
(politics) Opposed to one's own nation; unpatriotic.
(adj) :
(politics) Opposed to purely national concerns; not founded on the idea of the nation.
(n) :
(Indian politics, Hindutva, derogatory, accusatory) One who is opposed to India, usually suggesting pro-Pakistan or leftist associations, hostility against the Hindu religion, or opposition to Hindu nationalism.
(adj) :
(politics) Opposed to one's own nation; unpatriotic.
(adj) :
(politics) Opposed to purely national concerns; not founded on the idea of the nation.
(n) :
(Indian politics, Hindutva, derogatory, accusatory) One who is opposed to India, usually suggesting pro-Pakistan or leftist associations, hostility against the Hindu religion, or opposition to Hindu nationalism.