gap; space; break; interlude; chink (in one's armor, armour); chance
prior; beforehand; in advance; before the fact; ex ante
practice; training; drill; (an) exercise; workout
to pile up; to heap up; to stack up; to repeat many times over; to go through repeatedly; to accumulate
high-speed; rapid; express; highway; freeway; expressway
exchange; conversion; replacement; switching (to); switchover
plural; multiple; several
use; exercise (of one's right, authority, power, etc.)
hidden ball trick; ace up one's sleeve; secret weapon
hand; arm; forepaw; foreleg; handle; hand; worker
to smoke; to breathe in; to suck; to sip; to absorb; to soak up
dark red; dark brown; reddish brown
edge (of a knife or sword); prong (of an electrical plug)
to stop up; to close up; to stand in the way; to obstruct; to occupy; to fill up
standing facing each other (e.g. mountains, buildings); standing opposite each other; confrontation; squaring off against (adversaries, armies, forces); standing off against
corresponding to (in meaning, function, etc.); being equivalent to; appropriate; suitable; to be proportionate to; to be in keeping with
funny; comical; humorous; ridiculous; silly; absurd
most suitable; optimum; optimal; best
solution (of an equation, inequality, etc.); root (e.g. of a polynomial); solution (to a given problem); answer; explanation; interpretation
abruptly; suddenly; all of a sudden; without warning
back; rear; background; behind the scenes
lump; mass; group; crowd; embodiment (of an idea, quality, feeling etc.); personification
to be sufficient; to be enough; to be worth doing; to be worthy of; to do (the job); to serve
filleting a fish (into boneless left and right halves and a piece with the skeleton)
to keep company; to listen to; to associate with; to play against (e.g. a team); to take on (e.g. a rival)
part (esp. of the body); region; site; cut (of meat)
tail (animal); tail end; tip
hands and feet; limbs; person at one's beck and call; person at hand; reliable worker
to mow down; to scythe down; to knock someone off their feet
mostly; nearly; practically; well-nigh; almost invariably; all but
pattern; behavioural pattern; behavioral pattern; predictability
hole; opening; pit; hollow; burrow; den; deficit
sludge; slime; chemical ooze
though one didn't intend (expect) to
to fire (gun, arrow, questions, etc.); to shoot; to set free; to release; to emit (e.g. light); to give off (e.g. a scent)
no need to guess; certainly
excretion; discharge; excrement