ESPIAL
detection, catching, espial, spying, spotting
(noun) the act of detecting something; catching sight of something
Source: WordNet® 3.1
Etymology
Noun
espial (countable and uncountable, plural espials)
Act of noticing or observing.
The fact of noticing or observing; a discovery.
(obsolete) A spy; a scout.
Anagrams
• epsila, lipase, plaise
Source: Wiktionary
Es*pi"al, n. Etym: [OE. & Norm. F. espiaille. See Espy.]
1. The act of espying; notice; discovery.
Screened from espial by the jutting cape. Byron.
2. One who espies; a spy; a scout. [Obs.] "Their espials . . .
brought word." Holland.
Source: Webster’s Unabridged Dictionary 1913 Edition