Correlative

The term correlative refers to a pair of items which work together to connect things in a sentence. Examples are: both…and, not only…but also, either…or, neither…nor and so…that.

Concessive clause

A concessive clause is an adverbial clause which expresses the sense of although. The first clauses in the following sentences are examples of concessive clauses.
Although he was not feeling well, he kept working.
Although she is qualified, Susie didn’t get the job.

Collective noun
A collective noun denotes a collection of individual persons or objects. Examples are: jury, army, committee, team, herd etc.
In British English a collective noun may be treated either as singular or as plural. In American English a collective noun is always treated as singular.

Article

Affix

Adjective clause

An adjective clause is the same as a relative clause. Adjective clauses are used to modify nouns or noun phrases.

Adjective phrase

Absolute comparative

The term absolute comparative refers to a comparative form used without a standard of comparison. Examples are: the younger generation, he knows better. In these examples the absolute comparative does not provide an answer to the questions ‘younger than who’ or ‘better than whom’.