south southeast vs SSE

south southeast and SSE both are nouns.

Word	Noun	Adjective	Verb	Adverb
south southeast	Yes	No	No	No
SSE	Yes	No	No	No

As nouns, south southeast and SSE are synonyms defined as:

south southeast and SSE: the compass point midway between south and southeast

Other synonyms of south southeast include sou'-sou'-east.

south southeast (noun)	SSE (noun)
the compass point midway between south and southeast	the compass point midway between south and southeast