is a specific kind of: beholder, observer, perceiver, percipient.

is a broader term that covers: eavesdropper.

is a member of: audience.

derivation: listen | advert, attend, give ear, hang, pay heed | hear, listen, take heed.

is a specific kind of: assistant, help, helper, supporter.

is a broader term that covers: companion | baggageman | batman | bellboy, bellhop, bellman | bridesmaid, maid of honor | caddie, golf caddie | checker | courtier | cupbearer | equerry | escort | esquire | famulus | gillie | groomsman | lifeguard, lifesaver | linkboy, linkman | loader | matron of honor | hospital attendant, orderly | orderly | page, varlet | page | racker | rocker | second | servitor | squire | gallant, squire | flight attendant, steward | litter-bearer, stretcher-bearer | trainbearer | arouser, rouser, waker ... show more.

derivation: assist, attend, attend to, serve, wait on | tend | attend, go to.

is a specific kind of: participant, player.

is a broader term that covers: conventioneer | partygoer | symposiast.

derivation: get together, meet | attend, go to | attendant.