Synonyms for Strong:

adj.

all (adjective)
hard.
athletic (adjective)
robust.
authoritative (adjective)
autocratic, arrogant, consequential, important, commanding, dictatorial, authoritative, effective, masterful, authoritarian, imperious, effectual, powerful, influential, impressive, potent.
brave (adjective)
hardy, stalwart.
courageous (adjective)
manly.
deep (adjective)
extreme.
defended (adjective)
fortified.
determined, resolute (adjective)
dedicated, intelligent, deep, brave, potent, cogent, eager, sagacious, zealous, keen, intense, perceptive, clear, courageous, fierce, vehement, fervid, fervent, plucky, severe, steadfast.
distinct, unmistakable (adjective)
great, formidable, powerful, marked, hard, effective, stimulating, influential, persuasive, stiff, sharp.
durable (adjective)
persistent.
effective (adjective)
cogent.
energetic (adjective)
mighty, zippy, peppy, fervid, vivacious, spunky, snappy, driven, mettlesome, energetic, puissant, spirited, active, forceful, ardent, vigorous, effervescent, powerful, potent, zealous.
extreme (adjective)
extreme, high, strict, drastic, acute.
forcible (adjective)
forcible.
hard (adjective)
spirituous, intoxicative.
healthy (adjective)
sense.
healthy, powerful (adjective)
energetic, sinewy, forceful, hardy, heavy, athletic, mighty, rugged, well-founded, capable, tough, able-bodied, muscular, firm, solid, sound, active, stable, fixed, durable, forcible, substantial, stalwart, unyielding, tenacious, secure, robust, enduring, hearty, vigorous, big, sturdy, able, reinforced, staunch, stout, strapping.
intelligent (adjective)
perceptive, intelligent, sagacious.
powerful (adjective)
commanding, competent, energetic, mighty, dominant, forceful, authoritative, great, puissant, controlling, masterful, high-powered, vigorous, powerful, potent, supreme.
rocklike (adjective)
hard.
strong (adjective)
husky, stout, muscular, brawny, mighty, formidable, robust, potent, virile, vital, sturdy, energetic, firm, hardy, stalwart, vigorous, stable, sinewy, mettlesome, powerful, tough.
tenacious (adjective)
diligent, hard, resolute, staunch, stony, true, indefatigable, headstrong, faithful, obdurate, tireless, dauntless, stubborn, brave, indomitable, enduring, tough, steadfast, undaunted, obstinate, plucky, decisive, stiff, bold, determined, strong-willed, persistent, insistent, tenacious, spunky, hearty, devoted, flintlike, persevering, dogged, fervent, courageous, bullheaded, unflagging, bulldogged.
unmixed (adjective)
straight.
vigorous (adjective)
peppy, impassioned, puissant, burning, excited, passionate, dynamical, industrious, prolific, animated, mettlesome, lively, hearty, full-blooded, ablaze, powerful, fiery, exuberant, eager, emphatic, afire, earnest, active, ardent, fervent, enthusiastic, zealous, lusty, zestful, vigorous, virile, strenuous, zippy, sprightly, energetic, agitated, spirited, frisky, potent.

n.

stimulating, authentic, factual, intoxicating, certain, objective, realistic, undeniable, hot, definitely. sharp, large, considerable, extensive, huge, widely, enormous. accomplished, expert, transliterate, skillful, gifted, experienced, capable, reliable. dire, awful, desperate, rigorous, serious, grave. acutely, bitter, depth, deep-seated, blind, basic, affective, casual. purposeful, ambitious, dynamic, forcible, competitive, hard-hitting, motivated, sedulous, dynamical, dedicated. swift, agile, deft, nimble, brisk, speedy, sure, at full speed/tilt/throttle, high-speed, continue. apparent, manifest, visible, show up, perceptible, identifiable, distinct, plain. feasible, budding, promising, high, fierce, bright, up-and-coming, furious, likely, sure-fire, rosy. surface, solid as a rock, profound, irresistible, deep. functional, valuable, useful, operative, worthwhile, helpful, high-powered, practical, efficient. fiercely, lightly, full on the mouth/chin etc., intoxicative, mightily, ingestion, heavily, spirituous. competent (noun)
adept, proficient, skilled, able.
convincing (noun)
cogent, persuasive.
distinct (noun)
definite, marked, obvious, clear.
intense (noun)
keen, acute, sharp.
strong (noun)
forceful, robust, bullocky, alcoholic, hobnail, intense, beardown, reinforced, knock-down, irregular, hard, solid, unattackable, inviolable, hobnailed, brawny, potent, substantial, warm, invulnerable, well-knit, heavy, knockout, sinewy, strengthened, fresh, stiff, noticeable, beefed-up, multipotent, effectual, well-set, ironlike, severe, virile, equipotent, hefty, sound, firm, secure, muscular, accented, bullnecked, vehement, unassailable, impregnable, stressed, fortified.
undiluted (noun)
straight, rich, unmixed.

v.

enduring (verb)
durable.

Other synonyms:

plain. deep. high. big
strapping.
convincing
persuasive.
fit
able-bodied.
husky
burly.
intense
intense, keen.
masculine
manly.
muscular
athletic.
springy
wiry.
Other relevant words:
sound, alcoholic, intense, acute, heavy, high, hardy, spirituous, forcible, stressed, solid, rugged, dynamic, stalwart, substantial, keen, accented.

Usage examples for strong

  1. " You are strong and will fight," she said. – A Man and a Woman by Stanley Waterloo
  2. You are not strong enough to take me. – Black Man's Burden by Dallas McCord Reynolds
  3. Now I shall get strong and well. – A Little Girl in Old Philadelphia by Amanda Minnie Douglas