Is ‘Binoculars’ singular or plural?
Some nouns are used only in the singular, even though they end in -s.
These include: the names of academic subjects such as classics, economics, mathematics/maths, physics; the physical activities gymnastics and aerobics; the diseases measles and mumps; and the word news:
Maths was never my best subject at school.
Aerobics is great fun – you should try it!
Nouns used only in the plural
Some nouns only have a plural form.
They cannot be used with numbers.
They include the names of certain tools, instruments and articles of clothing which have two parts.
Tools and instruments