Espy and Sights

Espy verb - To make note of (something) through the use of one's eyes.

Sights and espy are semantically related. In some cases you can replace term "Sights" with "Espy", this verbs are similar.

Sights noun - An optical instrument for aiding the eye in aiming, as on a firearm or surveying instrument.

Espy and sights are semantically related. Sometimes you can use "Espy" instead a verb "Sights".