safe; in (of a ball, in tennis, etc.); all right; OK
maximum permissible level or dosage
interplanetary cruise; planetary travel
perfect; complete; thorough; leaving nothing to be desired; more than satisfactory
(earthenware) mortar (for grinding)
emergency; unexpectedness
landing place (for aircraft); common ground; compromise; agreement
replacement; substitute; displacement; transposition; reset
outside the boat (ship, spaceship, etc.); outboard; extravehicular
suit (clothing); suit (playing cards)
cold storage; deep freeze; cryopreservation
being frustrated because something is not quite as hoped (just as one cannot scratch an itch from outside a shoe); having an itch that one cannot scratch
making an attempt; trial run
cease and desist order; stay order; discontinuance order; suspension order
guarantee of safety; ensuring safety
erasure; striking off; crossing out; cancellation; deletion
mother; motherboard; Mother (Superior); title of a senior nun
ingredient; component; composition
expansion; swelling; increase; growth
matter of the highest priority; top priority; first priority
freedom of information; access to information; disclosure of information (e.g. by the government)
(indoor) observation deck; observation room; observatory
to abolish; to abandon; to repeal; to dethrone; to depose
transient (symptom, phenomenon); temporary; passing; fleeting
detailed knowledge; finely detailed