capacity; volume; capacitance
second (unit of time); arc second
crossing; intersection; (genetic) crossing over
(one's) superior; (one's) boss; the higher-ups
noise (usu. unpleasant); interference (e.g. radio); static; gossip; irresponsible criticism
pseudo; quasi; artificial; simulated
extraction; abstraction; selection (from a group); sampling
to follow advice; to act upon advice
assistant; helper; assistant (to a professor); research assistant
to be mixed; to be blended with; to associate with; to mingle with; to join
recuperation; medical treatment
visit (to someone affected by illness or misfortune); call; inquiry (about someone's health); letter of inquiry; letter of sympathy; get-well letter
number (in a series); (one's) turn; watch; guard; rank; standing; bout
interest; appeal; attraction; fun
omen; sign; notice; indication
preceding paragraph, section, or verse
have to do; must; should; ought to
to make sense; to be consistent; to be logical; to stand to reason; to be coherent
demonstration; verification; substantiation; actual proof
linear differential equation
guidance; leading; induction; introduction; incitement; inducement
to be able to do; to be capable of doing
prosperous; flourishing; popular; widespread; active; lively
in some way or other; one way or another; somehow; only just; barely
logical value (true or false); truth value
(in the) presence (of); in front (of); before (someone)