sturdy vs inflexible

sturdy and inflexible both are adjectives.

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

As adjectives, sturdy and inflexible are synonyms defined as:

Other synonyms of sturdy include uncompromising.

sturdy (adjective)	inflexible (adjective)
not making concessions	resistant to being bent
having rugged physical strength; inured to fatigue or hardships	incapable of change
substantially made or constructed	not making concessions
	incapable of adapting or changing to meet circumstances