quarrel; feud; wrangling; snarling (at each other)
common sense; common knowledge; common understanding
to play a role; to serve a function; to play a part
sound argument; fair argument; just reasoning
sink or swim; all or nothing; hit or miss; make or break
improper way (of doing); wrong way; unorthodox method; evil course; evil path; heresy
sharing one's lot with another; being in the same boat
person of doubtful origin
birth; lineage; identity; background; provenance; origin
(personal) background check
link; directory entry; rink
personal; individual; private
(an) unknown; unknown number; variable; unknown quantity; not yet known
dramatic; exciting; touching; extreme
resolute; firm; dauntless; undaunted
first-person plural (or singular); second or third person plural (implies speaker is of higher status than those referred to)
person who poses a high risk
to concentrate one's effort (on something)
(one's) superior; (one's) boss; the higher-ups
cowardice; timidity; bashfulness
valuation; appraisal; evaluation; appreciation; recognition; acknowledgement
staff officer; military staff; adviser; counselor; counsellor
to keep a record; to keep a tally
trump card; ace up one's sleeve; secret weapon
great difference; big difference; wide margin
applying (e.g. a technology); adoption
feature; trait; characteristic; peculiarity; distinction
stronghold; citadel; headquarters
to take a nap; to catch forty winks; to catch some Z's
to move (house); to transfer (department); to change the target of interest or concern; to elapse (passage of time); to be permeated by a colour or scent; to be infected
whiz (e.g. projectile through air); swoosh; whoosh; whistling sound
easy; simple; easygoing; lighthearted; simplistic
extremely dangerous; full of peril
to fall into someone's hands; to pass into another's possession
state of things; state of affairs; condition; situation; circumstances