steadfast vs unfaltering

steadfast and unfaltering both are adjectives.

Word	Noun	Adjective	Verb	Adverb
steadfast	No	Yes	No	No
unfaltering	No	Yes	No	No

As adjectives, steadfast and unfaltering are synonyms defined as:

steadfast and unfaltering: marked by firm determination or resolution; not shakable

Other synonyms of steadfast include firm, steady, stiff, unbendable, unshakable, unwavering.

steadfast (adjective)	unfaltering (adjective)
firm and dependable especially in loyalty	marked by firm determination or resolution; not shakable
marked by firm determination or resolution; not shakable