incessant

As adjectives the difference between incessant and cessant

is that incessant is without pause or stop; not ending, especially to the point of annoyance while cessant is (obsolete) inactive; dormant.

As adjectives the difference between permanent and incessant

is that permanent is without end, eternal while incessant is without pause or stop; not ending, especially to the point of annoyance.

As a noun permanent

is a chemical hair treatment imparting or removing curliness, whose effects typically last for a period of weeks; a perm.

As a verb permanent

is (dated) to perm (the hair).

As an adjective incessant

is without pause or stop; not ending, especially to the point of annoyance.

As a noun noise is

various sounds, usually unwanted.

As a verb noise is

to make a noise; to sound.

As adjectives the difference between ongoing and incessant

is that ongoing is continuing, permanent while incessant is without pause or stop; not ending, especially to the point of annoyance.

As a noun ongoing

is something that is going on; a happening.

As a noun succession

is an act of following in sequence.

As an adjective incessant is

without pause or stop; not ending, especially to the point of annoyance.

As adjectives the difference between incessant and frequent

is that incessant is without pause or stop; not ending, especially to the point of annoyance while frequent is frequent; often.

As a noun duration

is an amount of time or a particular time interval.

As an adjective incessant is

without pause or stop; not ending, especially to the point of annoyance.

Incessant is a synonym of unlimited.

As adjectives the difference between unlimited and incessant

is that unlimited is limitless or without bounds; unrestricted while incessant is without pause or stop; not ending, especially to the point of annoyance.

Never-ending is a related term of incessant.

As adjectives the difference between never-ending and incessant

is that never-ending is while incessant is without pause or stop; not ending, especially to the point of annoyance.

As adjectives the difference between incessant and continued

is that incessant is without pause or stop; not ending, especially to the point of annoyance while continued is (dated) prolonged; unstopped.

As a verb continued is

(continue).