unbending vs inflexible

unbending and inflexible both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unbending	No	Yes	No	No
inflexible	No	Yes	No	No

As adjectives, unbending and inflexible are synonyms defined as:

unbending and inflexible: incapable of adapting or changing to meet circumstances

Other synonyms of unbending include rigid.

unbending (adjective)	inflexible (adjective)
incapable of adapting or changing to meet circumstances	resistant to being bent
	incapable of change
	not making concessions
	incapable of adapting or changing to meet circumstances