is a specific kind of: interact.

is a broader term that covers: aggroup, group | meet | congregate | hive | fort, fort up | convene | clump, cluster, constellate, flock | crowd, crowd together | converge | turn out | caucus | club ... show more.

verb group: come across, encounter, meet, run across, run into, see.

derivation: assemblage, assembly, gathering | coming together, congress, meeting | assemblage, gathering | get together, meeting.