We don't have synonyms for lissen yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are listen, lessen and lisse.
(v) :
Eye dialect spelling of listen. [(intransitive except in archaic usage) To use one's sense of hearing and auditory cognition in an intentional way; to make deliberate use of one's ears; to pay attention to or wait for a specific sound.]
(v) :
Eye dialect spelling of listen. [(intransitive except in archaic usage) To use one's sense of hearing and auditory cognition in an intentional way; to make deliberate use of one's ears; to pay attention to or wait for a specific sound.]