rigid vs unbending

rigid and unbending both are adjectives.

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

As adjectives, rigid and unbending are synonyms defined as:

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

Other synonyms of rigid include inflexible.

rigid (adjective)	unbending (adjective)
designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure	incapable of adapting or changing to meet circumstances
incapable of or resistant to bending
incapable of compromise or flexibility
fixed and unmoving
incapable of adapting or changing to meet circumstances