sotadic verse vs poem

sotadic verse and poem both are nouns.

Word	Noun	Adjective	Verb	Adverb
sotadic verse	Yes	No	No	No
poem	Yes	No	No	No

As nouns, poem is a hypernym of sotadic verse; that is, poem is a word with a broader meaning than sotadic verse:

sotadic verse: palindromic verse, named after Satodes, an Ancient Greek poet.
poem: a composition written in metrical feet forming rhythmical lines

Other hypernyms of sotadic verse include verse form.

sotadic verse (noun)	poem (noun)
palindromic verse, named after Satodes, an Ancient Greek poet.	a composition written in metrical feet forming rhythmical lines