header (on a document, email, etc.)
combine; combine harvester
to maintain (preserve) peace
massacre; annihilation; wholesale slaughter
wizard; genius; remarkable talent; exceptional ability
inquiry; enquiry; hearing
boy; son; child; mere boy; stripling; greenhorn
to get mad; to be highly offended; to get pissed off; to get angry; to lose one's cool
diastrophism; movement and deformation of the earth's crust; upheaval (e.g. in politics); seismic shift; earthshaking changes
default settings; initial settings; initial configuration; initialization; initialisation
what date?; what's the date?; when?
frontline (military) base; forward base; outpost
scientific capability; scientific ability (e.g. of a student); scientific strength (e.g. of a country); level of technological development
remaining; left-over; excess
to chastise; to punish; to discipline
full throttle; full power
brains (of an operation); advisor; brain trust; brain (organ)
silly person; dumb-bunny; dope
rewriting (book); renewal; transfer of ownership
high-spec; highly competitive (on the dating scene, e.g. by having a high income, being good-looking); ticking all the boxes
definitely; absolutely; without doubt; absolute; unconditional
secret; private; surreptitious
unfortunately; unluckily; regrettably
to leave alone; to leave as is; to ignore; to neglect
broken into small fragments; smashed to atoms; fragments and splinters; smithereens
collar; lapel; neckband; nape of the neck; scruff of the neck
what; what kind of; no ...; any; adds emphasis to the preceding word; no
gazing at (in wonderment)