unsuspecting vs unsuspicious

unsuspecting and unsuspicious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unsuspecting	No	Yes	No	No
unsuspicious	No	Yes	No	No

As adjectives, unsuspecting and unsuspicious are synonyms defined as:

unsuspecting (adjective)	unsuspicious (adjective)
not suspicious	not suspicious
(often followed by `of') not knowing or expecting; not thinking likely