Synonyms of random

How is the word random distinct from other similar adjectives?

The words casual and haphazard are common synonyms of random. While all three words mean "determined by accident rather than design," random stresses lack of definite aim, fixed goal, or regular procedure.

When is casual a more appropriate choice than random?

While in some cases nearly identical to random, casual suggests working or acting without deliberation, intention, or purpose.

When is it sensible to use haphazard instead of random?

Although the words haphazard and random have much in common, haphazard applies to what is done without regard for regularity or fitness or ultimate consequence.