Exploratory
Investigative, Fact-finding (Adjective).
Concentration
Cluster, Congregation, Assemblage (Noun).
Incredible
Unbelievable, Improbable, Unimaginable (Adjective).
Exuberance
Buoyancy, Cheerfulness, Ebullience (Noun).
Audacity
Impudence, Impertinence, Insolence (Noun).
Reverential
Respectful (Adjective).
Schoolmarm
A schoolmistress (Noun, North American colloquial usage).
Skepticism
Doubtfulness, Dubiousness (Noun).
Candidly
Frankly, Honestly, Naturally (Adverb).
Sophisticated
Experienced, Knowledgeable (Adjective).
Intruder
Trespasser, Invader (Noun).
Bequeath
Consign, Entrust (Verb).
Decorous
Decent, Becoming, Befitting (Adjective).
Arrogant
Haughty, Egotistic (Adjective).
Retaliate
Fight back, Strike Back, Reciprocate (Verb).
Massacre
Slaughter, Annihilate, Exterminate (Verb, can also be used as a noun).
Confinement
Imprisonment, Captivity, Incarceration (Noun).
Subordinate
Junior, Lower-ranking (Adjective).
Remnant
Survivor (Adjective).
Encompass
Enclose, Surround, Engulf, Encircle (Verb).
Penetrate
Infiltrate, Sneak in (Verb).
Unyielding
Resolute, Uncompromising, Inflexible (Adjective).
Compliant
Acquiescent, Accommodating, Complaisant (Adjective).