Difference between Unceasing and Incessant

UNCEASING vs INCESSANT: ADJECTIVE

Without pause or stop; not ending, especially to the point of annoyance.
Continuing or following without interruption; unceasing; unitermitted; uninterrupted; continual
Continuing without interruption. : continual.
Uninterrupted in time and indefinitely long continuing
Occurring so frequently as to seem ceaseless or uninterrupted

Synonyms Continuous, Incessant, Continual, Perpetual; unremitting, unremitted. Continuous means unbroken, and is passive; incessant means unceasing, and is active. The former is preferable to note duration, condition, or result; the latter, to describe the exertion by which the condition or result is produced. We speak of a continuous or an incessant fever, according as we think of the fever as a state or as an activity; and similarly of a continuous or incessant strain of music, and the continuous or incessant murmur of a brook; but only of a continuous railroad-track or telegraph-wire. Continual regularly implies the habitual or repeated renewals of an act, state, etc.: as, a continual succession of storms. In the Bible continual is sometimes used for continuous, but the distinction here indicated is now clearly established. Perpetual is continuous with the idea of lastingness: as, perpetual motion. It is often used in the sense of continual: as, I am sick of such perpetual bickerings. In either sense, unless the thing is really everlasting, it is used by hyperbole, as implying that one sees no end to the matter. See eternal.
Continued or repeated without interruption or intermission; unceasing; ceaseless: as, incessant rains; incessant clamor.

Unrelenting, Never ending, Permanent, Ageless, Lasting, Uninterrupted, Eternal, Everlasting, Perpetual, Continuous, Constant, Unremitting, Incessant, Unending, Ceaseless

Unabated, Persistent, Relentless, Unending, Unrelenting, Never ending, Uninterrupted, Perpetual, Continuous, Unremitting, Endless, Constant, Continual, Unceasing, Ceaseless

Unrelenting, Never ending, Permanent, Ageless, Lasting, Uninterrupted, Eternal, Everlasting, Perpetual, Continuous, Constant, Unremitting, Incessant, Unending, Ceaseless

Unabated, Persistent, Relentless, Unending, Unrelenting, Never ending, Uninterrupted, Perpetual, Continuous, Unremitting, Endless, Constant, Continual, Unceasing, Ceaseless

The poem is characterized by an incessant rhythmic pattern.
Finally, after incessant cajoling, he gave me the copy.
Incessant sweat, not washing properly, ignoring the abnormalities, etc.
First Look International, Incessant Barking Productions, and Tartan Films.
We have had incessant rains since your departure.
They test his patience through their incessant complaints.
The incessant flashes of lightning took various forms.
Traffic was badly disrupted due to incessant rain.
Consequently, violence was incessant across these four decades.
There is also incessant communication and checking in, which often occurs through incessant phone calls, text messages and email communication.