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However, certain words that sound somewhat similar are not
synonyms and have completely different meaning:
physicist, physician;
geologist, genealogist, gynaecologist;
metrology, meteorology, mereology.

7.4 Antonyms in Terminology.
Technical antonyms generally describe technical objects and
subjects. The terms ‘antonym’ and ‘opposite’ are synonyms. In
contrast to the diversity of synonyms, the number of antonyms for
a particular term is rather limited. For example, some antonyms of
the adjective ‘technical’ are: general, nonspecialized,
nontechnical.
Near antonyms of ‘technical’ are: common, generalized,
nonspecific, ordinary, universal; inexpert, nonprofessional,
unprofessional.
Some examples of antonym pairs are the following:
Passive airdefence – actice airdefence
Mining – mine lifting (мінування – ролзмінування)
Antonyms are frequently constructed with some common
prefixes: anti-, dis-, in-, non-, un-, etc.:
matter – antimatter;
approval – disapproval;
homogeneous – inhomogeneous;
symmetriс – nonsymmetric;
known – unknown;
and some suffixes:
wired – wireless, etc.
Note that the said prefixes/suffixes should be used with a
proper understanding of the technical terminology, for instance,
the words antisymmetric and nonsymmetric have different
meaning.

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