unrealistic vs false

unrealistic and false both are adjectives.

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

unrealistic (adjective)	false (adjective)
not realistic	not in accordance with the fact or reality or actuality
	not genuine or real; being an imitation of the genuine article
	adopted in order to deceive
	designed to deceive
	(used especially of persons) not dependable in devotion or affection; unfaithful
	arising from error
	inaccurate in pitch
	deliberately deceptive
	erroneous and usually accidental
	inappropriate to reality or facts

unrealistic (adverb)	false (adverb)
	in a disloyal and faithless manner