success vs triumph

success and triumph both are nouns.

Word	Noun	Adjective	Verb	Adverb
success	Yes	No	No	No
triumph	Yes	No	Yes	No

As nouns, triumph is a hyponym of success; that is, triumph is a word with a more specific, narrower meaning than success:

Other hyponyms of success include barnburner, Godspeed, victory, bite.

success (noun)	triumph (noun)
an attainment that is successful	a successful ending of a struggle or contest
an event that accomplishes its intended purpose	the exultation of victory
a person with a record of successes
a state of prosperity or fame