I might call on her later : VISIT, pay a call on, go and see, look/drop in on; N. Amer. visit with; informal look up, pop in on.
he called on the government to hold a plebiscite : APPEAL TO, ask, request, petition, urge.
we are able to call on qualified staff : HAVE RECOURSE TO, avail oneself of, draw on, make use of.
2192; headword