sou'-sou'-east vs south southeast

sou'-sou'-east and south southeast both are nouns.

Word	Noun	Adjective	Verb	Adverb
sou'-sou'-east	Yes	No	No	Yes
south southeast	Yes	No	No	No

As nouns, sou'-sou'-east and south southeast are synonyms defined as:

sou'-sou'-east and south southeast: the compass point midway between south and southeast

Other synonyms of sou'-sou'-east include SSE.

sou'-sou'-east (noun)	south southeast (noun)
the compass point midway between south and southeast	the compass point midway between south and southeast

sou'-sou'-east (adverb)	south southeast (adverb)
to, toward, or in the south southeast