unrelenting vs inexorable

unrelenting and inexorable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unrelenting	No	Yes	No	No
inexorable	No	Yes	No	No

As adjectives, unrelenting and inexorable are synonyms defined as:

unrelenting and inexorable: not to be placated or appeased or moved by entreaty

Other synonyms of unrelenting include grim, relentless, stern, unappeasable, unforgiving.

unrelenting (adjective)	inexorable (adjective)
never-ceasing	not to be placated or appeased or moved by entreaty
not to be placated or appeased or moved by entreaty	impervious to pleas, persuasion, requests, reason
punishingly harsh