bear oak vs scrub oak

bear oak and scrub oak both are nouns.

Word	Noun	Adjective	Verb	Adverb
bear oak	Yes	No	No	No
scrub oak	Yes	No	No	No

As nouns, scrub oak is a hypernym of bear oak; that is, scrub oak is a word with a broader meaning than bear oak:

bear oak: shrubby oak of southeastern United States usually forming dense thickets
scrub oak: any of various chiefly American small shrubby oaks often a dominant form on thin dry soils sometimes forming dense thickets

bear oak (noun)	scrub oak (noun)
shrubby oak of southeastern United States usually forming dense thickets	any of various chiefly American small shrubby oaks often a dominant form on thin dry soils sometimes forming dense thickets