confidence, trust, belief, conviction, religion, church, persuasion, dogma, creed
Some synonyms for "faithful" are loyal, devoted, dedicated, and reliable.
loyal, true, committed, constant, devoted, dedicated, reliable, staunch, accurate, close, true, strict, exact, precise
Trustworthy and loyal are the first ones that come to my mind
A derivative adjective for the noun faith is faithful. Its adverb form is faithfully (which can mean loyally). The negative forms are unfaithfully and faithlessly.
An adverb form of faith could be "faithfully" or "faithlessly" depending on the meaning.
These have connotations other than just in a manner suggesting faith.
belief
Synonym: loyal, devoted. Antonym: disloyal, unfaithful.
Loyal? or allegiance. faithfulness, fealty (synonym to allegiance)
Morally upright, ethical, righteous.
zealous, purposeful, loyal, devoted, committed, faithful, enthusiastic, single-hearted, hard-working
credibilityDependability, accuracy, honesty, steadfastness, fidelity, loyalty, trustworthiness...
As faithful as a dogAs faithful as a good bookAs faithful as the fair weather
Faithful is an adjective, it doesn't have a present tense.
Faithful
accurate, honest, believable, candid, correct, factual, faithful, forthright, just, kosher, legit, precise, real, reliable, scrupulous, sincere, straight, true, trustworthy, veracious, veritable.
More faithful
No, old faithful is a geyser.
The faithful contributed to the pastor's fund. The faithful dog stayed by his master's side until he died. He was faithful to the law and his obligations.