and various other things; and many others; and all the rest; and so on and so forth
from long ago; from old times; from time immemorial
to perform; to do; to conduct oneself; to carry out
manufacturing method; recipe; formula
present age; present day; contemporary; modern era; modern times; contemporary era
caustic soda; sodium hydroxide
to use; to make use of; to utilize; to utilise
simple; easy; uncomplicated; brief; quick; light
direction; way; person; lady; method of; manner of; care of ...
to spread; to be propagated
first of all; to begin with; probably; most likely; more or less (satisfactory); on the whole
another name; different name; synonym; alias; pseudonym; pen name
separation; partition; detachment; segregation; isolation
time; hour; season; suitable time; opportunity; chance
to separate; to part; to divide; to keep apart
toxicity; virulence; toxic; virulent; poisonous
corrosiveness; causticity
gas (as a fuel); gas (state of matter); poison gas; dense fog; thick fog; gas stove; gas cooker
occurrence; incidence; generation (of power, heat, etc.); production; ontogeny; development
attention; notice; care; caution; advice; warning
again; once more; also; too; on the other hand; while; and
air; atmosphere; mood; situation; someone with no presence; someone who doesn't stand out at all
(all) through (e.g. the night); throughout (e.g. the year); within (e.g. the week); in the course of (e.g. today); all over; throughout (e.g. the world)
emergency; extreme; great; extraordinary
water; liquid; fluid; moisture; humidity; sap
to add; to add up; to increase; to gather (e.g. speed); to include; to count in
generation of heat; (attack of) fever; pyrexia
explosion; detonation; blast; outburst (of emotion); explosion (e.g. of anger); eruption (e.g. of discontent)
to cause; to induce; to bring about; to pull upright; to help up (e.g. a fallen person)
material; substance; matter
this; this one; this person; now; this point (in time); here; used to stress the subject of a sentence
careful; cautious; prudent; discreet; deliberate
lump; mass; group; crowd; embodiment (of an idea, quality, feeling etc.); personification
to remove; to deinstall; to take away; to set apart
by all means; at any cost; whether (one is) willing or not; willingly or unwillingly; on no account; by no means
surface; face; outside; exterior; appearances; superficiality
a little; a bit; a little while; a short time; a little way; a short distance
to finish; to stop; to close (a business, etc.); to close down; to put away; to put back