We don't have synonyms for mindmap yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are mind map and minimap.
(n) :
Alternative spelling of mind map. [A diagram used to represent words, ideas, tasks or other items linked to and arranged radially around a central key word or idea.]
(v) :
Alternative spelling of mind map. [(transitive, intransitive) To create a mind map (around a topic).]
(n) :
Alternative spelling of mind map. [A diagram used to represent words, ideas, tasks or other items linked to and arranged radially around a central key word or idea.]
(v) :
Alternative spelling of mind map. [(transitive, intransitive) To create a mind map (around a topic).]