Spidergrams, spidergraphs, spider diagrams and spider maps are all terms used to describe a mindmap-like hierarchical diagram.
Other uses of these terms
The time “spider diagram” also has a disputed meaning related to Euler or Venn diagrams in mathematics – see the | Wikipedia entry
The term “spidergram” also has alternative meanings:
“Spidergrams are histogram like plots of the abundances of a set of elements in an analyzed sample relative to their abundance in some standard.”