1) Beckon 2) Communicate 3) Express by hand movements 4) Express by or make gestures 5) Gesture 6) Indicate 7) Intercommunicate 8) Make wild hand movements 9) Motion 10) Signal 11) Use body language 12) Wave Found on https://www.crosswordclues.com/clue/gesticulate
Ges·tic'u·late intransitive verb [ imperfect & past participle Gesticulated ; present participle & verbal noun Gesticulating .] [ Latin gesticulatus , past participle of gesticulari to gesticulate, from gesticulus ... Found on http://www.encyclo.co.uk/webster/G/23