is a specific kind of: individual, mortal, person, somebody, someone, soul.

is a broader term that covers: eyeglass wearer | discoverer, finder, spotter | attender, auditor, hearer, listener | audile | motile | noticer | seer | looker, spectator, viewer, watcher, witness | visualiser, visualizer | informant, witness, witnesser.

derivation: comprehend, perceive | note, observe, take note | behold, lay eyes on | detect, discover, find, notice, observe | follow, keep an eye on, observe, watch, watch over.