phenomenal
1. [ adjective ] of or relating to a phenomenon
Examples:

"phenomenal science"

Related terms: phenomenon
2. [ adjective ] exceedingly or unbelievably great
Synonyms: fantastic
Examples:

"the bomb did fantastic damage" "Samson is supposed to have had fantastic strength" "phenomenal feats of memory"

Related terms: extraordinary
Similar spelling:   phenomenally
  phenomenon
  phenomenology