Origin: Latin suffix -ance
Reconnaissance has 2 different meanings across 1 category:
the act of reconnoitring (especially to gain information about an enemy or potential enemy)
"an exchange of fire occurred on a reconnaissance mission"
The act of scouting or exploring (especially military or medical) to gain information.
"Before launching the full-scale attack, the general ordered a small team to conduct reconnaissance along the enemy's perimeter."