implicit vs underlying

implicit and underlying both are adjectives.

Word	Noun	Adjective	Verb	Adverb
implicit	No	Yes	No	No
underlying	No	Yes	No	No

implicit (adjective)	underlying (adjective)
implied though not directly expressed; inherent in the nature of something	being or involving basic facts or principles
being without doubt or reserve	in the nature of something though not readily apparent
	located beneath or below