Collocations for category - noun

broad, general, large
narrow
basic
individual, one, single, special, specific
We have created a special category for part-time workers.

different, discrete, distinct, separate
high, low
Most of his ratings were in the highest category.

important
high-risk
Intravenous drug users are in a high-risk category for hepatitis C.

age, ethnic (esp. AmE), gender, income, job, occupational, racial (esp. AmE), social
price, size, weight

be included in, belong to, come into, fall into, fit, fit into
The cities investigated fell into two broad categories.

constitute, form
The Individualists constitute the largest category of great artists.
Flutes form a separate category of wind instruments.

create, define, develop, establish, invent
distinguish, identify, recognize

comprise sth, consist of sth, contain sth, cover sth, encompass sth, include sth
be based on sth
categories based on ethnic origin

in a/the category, within a/the category
He competed in the youngest age category.

category of
a higher category of prison

category for
There's a separate category for children.

be in a category (all) of its/your own, be in its/your own category (= to be unique)
be in the same category (as sth)