trivial vs lilliputian

trivial is not a noun while lilliputian is a noun.

Word	Noun	Adjective	Verb	Adverb
trivial	No	Yes	No	No
lilliputian	Yes	Yes	No	No

As adjectives, trivial and lilliputian are synonyms defined as:

Other synonyms of trivial include fiddling, footling, little, niggling, petty, picayune, piddling, piffling.

trivial (noun)	lilliputian (noun)
	a very small person (resembling a Lilliputian)

trivial (adjective)	lilliputian (adjective)
concerned with trivialities	very small
of little substance or significance	(informal) small and of little importance
(informal) small and of little importance