unrealistic vs fantastic

unrealistic and fantastic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unrealistic	No	Yes	No	No
fantastic	No	Yes	No	No

unrealistic (adjective)	fantastic (adjective)
not realistic	extraordinarily good or great; used especially as intensifiers
	extravagantly fanciful in design, construction, appearance
	ludicrously odd
	existing in fancy only
	fanciful and unrealistic; foolish