sodomy vs sexual activity

sodomy and sexual activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
sodomy	Yes	No	No	No
sexual activity	Yes	No	No	No

As nouns, sexual activity is a hypernym of sodomy; that is, sexual activity is a word with a broader meaning than sodomy:

Other hypernyms of sodomy include sex, sex activity, sexual practice.

sodomy (noun)	sexual activity (noun)
intercourse via the anus, committed by a man with a man or woman	activities associated with sexual intercourse
sexual activity between a person and an animal