Lifelong
Steadfast
Steadfast adjective - Firm in one's allegiance to someone or something.
Lifelong and steadfast are semantically related. Sometimes you can use "Lifelong" instead an adjective "Steadfast".
Nearby Words: steadfastness, steadfastly
Mutual synonyms
Cite this Source
Steadfast and Lifelong. (2016). Retrieved 2026, July 30, from https://thesaurus.plus/related/lifelong/steadfast
Lifelong & Steadfast. N.p., 2016. Web. 30 Jul. 2026. <https://thesaurus.plus/related/lifelong/steadfast>.
Steadfast or Lifelong. 2016. Accessed July 30, 2026. https://thesaurus.plus/related/lifelong/steadfast.
Google Ngram Viewer shows how "lifelong" and "steadfast" have occurred on timeline