Synonyms for Truly:

adv.

•quite (adverb)
purely.
•really (adverb)
really, actually, positively, literally, absolutely.
•really, doubtlessly (adverb)
sincerely, reliably, veritably, rightly, precisely, definitely, faithfully, genuinely, loyally, factually, positively, righteously, actually, correctly, in truth, devotedly, steadily, authentically, honorably, absolutely, honestly, truthfully, exactly, Veraciously, accurately, surely, staunchly.
•reliably (adverb)
reliably.
•resolutely (adverb)
fearlessly, doggedly, heartily, relentlessly, loyally, persistently, deliberately, boldly, intently, valiantly, devotedly, toughly, faithfully, resolutely, staunchly, stubbornly, decidedly, tirelessly, steadily, courageously, decisively, diligently, tenaciously, indomitably, pluckily, dauntlessly, determinedly, indefatigably.
•respectably (adverb)
blamelessly, righteously, angelically, worthily, irreproachably, right-mindedly, unimpeachably, virtuously, saintly, honorably, purely, fairly, law-abidingly, creditably, morally, forthrightly, nobly, respectably.
•tenaciously (adverb)
enduringly, steadfastly, stonily, stiffly, strongly, undauntedly, fervently, bravely, unflaggingly, obstinately.
•truly (adverb)
axiomatically, factually, definitely, veritably, honestly, rightly, certainly, authentically.
•veraciously (adverb)
accurately, Veraciously, correctly, genuinely.

adv

•aboveboard (adverb)
Veraciously.
•absolutely (adverb)
decisively.
•awfully (adverb)
immensely.
•de facto (adverb)
veritably.
•indeed (adverb)
in truth.
•really (adverb)
actually, positively, honestly, verily, really, surely, authentically, absolutely.
•resolutely (adverb)
fearlessly, doggedly, heartily, relentlessly, loyally, persistently, deliberately, boldly, intently, valiantly, devotedly, toughly, faithfully, resolutely, staunchly, stubbornly, decidedly, tirelessly, steadily, courageously, decisively, diligently, tenaciously, indomitably, pluckily, dauntlessly, determinedly, indefatigably.
•respectably (adverb)
creditably, purely, unimpeachably, worthily, respectably, right-mindedly, blamelessly, honestly, fairly, irreproachably, angelically, righteously, morally, virtuously, forthrightly, nobly, saintly, law-abidingly, honorably.
•tenaciously (adverb)
unflaggingly, determinedly, fervently, stonily, courageously, persistently, diligently, boldly, toughly, devotedly, dauntlessly, bravely, steadfastly, faithfully, indefatigably, indomitably, stiffly, strongly, undauntedly, tenaciously, heartily, enduringly, obstinately, staunchly, tirelessly, stubbornly, resolutely, pluckily, decisively, doggedly.
•truly (adverb)
authentically, definitely, axiomatically, absolutely, factually, certainly, veritably, honestly, rightly.
•veraciously (adverb)
authentically, Veraciously, accurately, genuinely, honestly, factually, correctly.

n.

certain, firm, factual, undeniable, objective, realistic, definite, authentic. accurate, right, strict, reliable, correct, precise, specific, scrupulously, exact, scientifically, justly, wrongly, reliably, unerring, perfect, exactly. simply, evidently, precisely, literally, essentially. deeply, well, a lot, particularly, thoroughly, immensely, greatly. •in truth (noun)
for fair, true, verily, truthfully, indeed.
•truly (noun)
genuinely, unfeignedly, forsooth, rightfully, sincerely, really, in truth.

Other synonyms:

•basically
essentially.
•honestly
truthfully.
•in truth
in truth, verily, indeed.
•Other relevant words:
exactly, true, particularly, precise, greatly, literally, factual, forsooth, thoroughly, correct, well, sincerely, truthfully, simply, reliably, essentially, authentic, justly, verily, right, for fair, rightfully, in truth, indeed, precisely, unfeignedly, certain, accurate, surely, reliable, definite, deeply.

Usage examples for truly

1. This is a truly Odyssean journey. – Sketches and Studies in Italy and Greece, Vol III. by John Symonds

2. " Truly it did," said the papa. – Christmas Every Day and Other Stories by W. D. Howells

3. " I never thought it could look so well," he replied, and he spoke truly – A Galahad of the Creeks; The Widow Lamport by S. (Sidney) Levett-Yeats