isomorphisms(graph1, graph2, method = "vf2", ...)isomorphic for details about it and extra arguments.count_isomorphisms,
  graph.count.isomorphisms.vf2;
  count_subgraph_isomorphisms,
  graph.count.subisomorphisms.vf2;
  graph.get.subisomorphisms.vf2,
  subgraph_isomorphisms;
  graph.isoclass,
  graph.isoclass.subgraph,
  isomorphism_class;
  graph.isocreate,
  graph_from_isomorphism_class;
  graph.isomorphic,
  graph.isomorphic.34,
  graph.isomorphic.bliss,
  graph.isomorphic.vf2,
  is_isomorphic_to, isomorphic;
  graph.subisomorphic.lad,
  graph.subisomorphic.vf2,
  is_subgraph_isomorphic_to,
  subgraph_isomorphic