strange vs unusual

strange and unusual both are adjectives.

Word	Noun	Adjective	Verb	Adverb
strange	No	Yes	No	No
unusual	No	Yes	No	No

As adjectives, strange and unusual are synonyms defined as:

strange and unusual: being definitely out of the ordinary and unexpected; slightly odd or even a bit weird

strange (adjective)	unusual (adjective)
being definitely out of the ordinary and unexpected; slightly odd or even a bit weird	not usual or common or ordinary
relating to or originating in or characteristic of another place or part of the world	being definitely out of the ordinary and unexpected; slightly odd or even a bit weird
not known before	not commonly encountered