southeastern vs southeasterly

southeastern and southeasterly both are adjectives.

Word	Noun	Adjective	Verb	Adverb
southeastern	No	Yes	No	No
southeasterly	No	Yes	No	No

As adjectives, southeastern and southeasterly are synonyms defined as:

southeastern and southeasterly: situated in or oriented toward the southeast

Other synonyms of southeastern include southeast.

southeastern (adjective)	southeasterly (adjective)
of a region of the United States generally including Alabama; Georgia; Florida; Tennessee; South Carolina; North Carolina	situated in or oriented toward the southeast
situated in or oriented toward the southeast	coming from the southeast