unity, alliance, agreement, understanding, consent; coincidence

encirlclement, envelopment, the action of surrounding; seige; enclosed place; fence, enclosure; understanding, comprehension

comprehension, understanding, perception

penetrating, shrewd, understanding something to a fine degree

endurance, tolerance; understanding, idea, concept

intelligence (as in government spying etc.)

intelligence, pertaining to intelligence (as in government spying etc.)

dull-witted, stupid, of limited intelligence

spying, intelligence, espionage

spying, reconnaissance; pertaining to intelligence, reconnaissance

understanding, reason, intellect

reasoning, intellect, understanding

mind, memory, intellect

consciousness, sense, feeling, intellect, understanding

mind, intellect, consciousness, awareness