trouble; quarrel; difficulties; complication; tangle
collision; crash; running into; conflict; quarrel; clashing
does not seem; unlikely; improbable
effect; efficacy; validity; potency
one's turn; one's shift; one's turn on stage; screen time; screentime
remarkably; noticeably; considerably; appreciably
system; organization; organisation; imperial command; laws; regulation
ground-breaking; revolutionary; unprecedented; epoch-making
exclusive; attached to; specialist
number (on its own, without considering its proportion to the whole); overall number
some people; a few people; several people
number of (large) animals
dissenting opinion; opposite viewpoint; contraview
to strike against; to collide with; to encounter; to meet; to clash
to compete with; to vie for
very easy; piece of cake; child's play; before breakfast