it's OK to ...; it's best to ...; it's alright to ...
circumference; outskirts; environs; (computer) peripheral
rubble; debris; wreckage; trash; rubbish
smell; scent; aura; whiff; faint, mist-like pattern along the temper line of a Japanese sword
(dead) body; corpse; remains
help; rescue; salvation; solace; (religious) salvation; (Christian) grace
to turn back; to go back; to come back; to return; to retrace one's steps
never mind!; don't worry about it
standard; criterion; norm; benchmark; measure; gauge
bubble; foam; froth; suds; lather; head (on beer)
to talk to oneself; to mutter
search (esp. for someone or something missing); manhunt; legally authorized search of a person, building, etc.
chief; main; principal; major
nailing on; nailing down; being stationary; being rooted to the spot; (price) pegging
smell of something rotten; rotten smell
trace; vestige; mark; sign; evidence
I don't know about ... but; it may be possible for ... but
before; prior to; ago; the past; before; previously
I got it; I see; I now know; so that's the reason
(what) one is trying to say; (what) one wants to say; (what) one is saying; (what) one means
assumption; supposition; hypothesis; supposition
to explain adequately; to be accountable
operation; management; handling; manipulating (to one's benefit); manipulation; influencing
to make; to produce; to prepare (food); to brew (alcohol); to raise; to grow; to till
in any case; at any rate; anyhow; anyway; as you know; for you see
unripe; green; immature; immature; inexperienced; unskilled
minimum; lowest; minimal; at a minimum
chase; pursuit; tracking; following up; tracing
to stop talking; to break off; to pause
inquiry; enquiry; question; searching; looking for
composition; synthesis; composite photo; (function) composition
going on ahead; forestalling; anticipating; arrival before another
play; recreation; playing (a sport); play; playing (a musical instrument); musical performance; play (theatrical performance)
implementation (e.g. of a feature); installation (of equipment); mounting; packaging
way of speaking; intimation