Crowd is a related term of circuit.
In obsolete|lang=en terms the difference between crowd and circuit
is that
crowd is (obsolete) a crwth, an ancient celtic plucked string instrument while
circuit is (obsolete) to travel around.
As verbs the difference between crowd and circuit
is that
crowd is to press forward; to advance by pushing or
crowd can be (obsolete|intransitive) to play on a crowd; to fiddle while
circuit is (obsolete) to move in a circle; to go round; to circulate.
As nouns the difference between crowd and circuit
is that
crowd is a group of people congregated or collected into a close body without order or
crowd can be (obsolete) a crwth, an ancient celtic plucked string instrument while
circuit is the act of moving or revolving around, or as in a circle or orbit; a revolution; as, the periodical circuit of the earth around the sun.