dead language; extinct language; obsolete word; word that has become passé
first (of all); firstly; probably; most likely; more or less (satisfactory); on the whole
(instruction) manual; operations manual; basic rules (pertaining to how a job should be carried out); (car with) manual transmission
to change; to exchange; to convert; to renew; to throw a switch; to replace
firing; shooting; fire; gunshot; marksmanship
seriousness; earnestness; truth; sanctity
neighbourhood; neighborhood
hostility; antagonism; opposition
action; conduct; behaviour; behavior; mobilization; mobilisation
to consider as; to regard (as equivalent); to deem (as); to equate
leaving out; omitting; skipping; (beating) in succession; in a row
sending a ship to the bottom; sinking (a ship); to sink a ship
sneakily; secretly; stealthily; on the sly
to leave as; to view as; to maintain the status quo
at least; at most; (even) just
behind; in the rear; in back
10,000; ten thousand; myriad; everything; all; (arch.) various
kilo-; 1000; kilogram; kilogramme; kilometre; kilometer
colonization; colonisation
allied forces; the Allies (e.g. in WWII)
Pleiades (in Greek mythology); Pleiades; the Seven Sisters
class (e.g. school); grade; rank; kyū; kyu; junior rank in martial arts, go, shogi, etc.
camouflage; disguise; pretense; feigning; masquerade
one more time; once more; once again
infrared rays; infrared radiation
gravitational wave; gravity wave
diligently; seriously; perfectly; properly; sufficiently; satisfactorily
to sink; to go under; to go down (e.g. sun); to set; to feel depressed; to become subdued
but then; although; though; reasonable; natural; just
destruction; disruption; (application) crash
dead body; corpse; cadaver; carcass
furthermore; adding to the above-mentioned; not quite; not very good; lacking
collection; recovery; withdrawal; retrieval
unusual; rare; new; novel; fine (e.g. gift)
to happen to meet; to come across
not the time for; not the place for; far from; anything but; ... is out of the question; ... isn't the word for it
to have an interest (in something); to feel inclined (toward doing something)