souther vs southerly

souther and southerly both are nouns.

Word	Noun	Adjective	Verb	Adverb
souther	Yes	No	No	No
southerly	Yes	Yes	No	Yes

As nouns, souther and southerly are synonyms defined as:

Other synonyms of souther include south wind.

souther (noun)	southerly (noun)
a wind from the south	a wind from the south

souther (adjective)	southerly (adjective)
	from the south; used especially of wind
	situated in or oriented toward the south

souther (adverb)	southerly (adverb)
	from the south
	toward the south