inflexible vs rigid

inflexible and rigid both are adjectives.

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

As adjectives, inflexible and rigid are synonyms defined as:

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

Other synonyms of inflexible include unbending.

inflexible (adjective)	rigid (adjective)
resistant to being bent	designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure
incapable of change	incapable of or resistant to bending
not making concessions	incapable of compromise or flexibility
incapable of adapting or changing to meet circumstances	fixed and unmoving
	incapable of adapting or changing to meet circumstances