Synonyms for Overwhelming:

adj.

amazing (adjective)
amazing, bewildering, impressive, surprising, astonishing, astounding, dazzling.
exciting (adjective)
rousing.
irresistible (adjective)
irresistible.
mind-blowing (adjective)
staggering.
overpowering (adjective)
devastating, stunning, astounding, amazing, staggering.
unbelievable (adjective)
unusual, strange, unbelievable, remarkable.

n.

burning, affective, conquering, blind, depth, reducing, Occupying, saving, deep, protective, casual, triumphant, acutely, deep-seated, devastating, bitter, overriding. floating, primary, chief, prime, supreme, principal, elementary, wrecking, basic, main, leading, predominant. emotional, punch, cathartic, rousing, stirring, staggering, charge, towering, big, inflammable, emotive, moving. astonishing (noun)
might, strong, frightful, awful, powerful.
overwhelming (noun)
irresistible, resistless, intense, consuming, overpowering.

v.

amazing (verb)
Impressing, stunning, Dazing.
overrunning (verb)
Outrunning, outpacing, outdistancing, Overstepping, Overrunning, overtaking, Transcending, Transgressing, surpassing, Overshooting.

Other synonyms:

cathartic, inflammable, rousing, stirring, devastating, emotive, moving. emotional. staggering, towering. punch. charge. Other relevant words:
strong, deep-seated, cathartic, remarkable, wrecking, principal, unbelievable, big, burning, reducing, might, inflammable, prime, supreme, intense, primary, deep, triumphant, stirring, emotive, resistless, depth, chief, acutely, blind, charge, frightful, devastating, overpowering, affective, predominant, staggering, irresistible, overriding, punch, protective, strange, unusual, bitter, conquering, floating, casual, awful, moving, towering, amazing, leading, Occupying, consuming, main, emotional, saving, rousing, basic, powerful, elementary.

Usage examples for overwhelming

  1. The attack was so fierce, so sudden and overwhelming that when the meaning of it had thoroughly dawned upon the soldiers, they had enough to do to protect themselves without giving much thought to their prisoner. – Princess Maritza by Percy Brebner
  2. All those things which had seemed to Yetta of overwhelming importance began to look very small. – Comrade Yetta by Albert Edwards
  3. Jill's wrath gave way to an overwhelming anxiety. – Betty Trevor by Mrs. G. de Horne Vaizey