phenomenal vs marvelous

phenomenal and marvelous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
phenomenal	No	Yes	No	No
marvelous	No	Yes	No	No

As adjectives, phenomenal and marvelous are synonyms defined as:

phenomenal and marvelous: extraordinarily good or great; used especially as intensifiers

Other synonyms of phenomenal include fantastic, grand, howling, marvellous, rattling, terrific, tremendous, wonderful, wondrous.

phenomenal (adjective)	marvelous (adjective)
of or relating to a phenomenon	extraordinarily good or great; used especially as intensifiers
extraordinarily good or great; used especially as intensifiers	too improbable to admit of belief
	being or having the character of a miracle