lechery vs sex activity

lechery and sex activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
lechery	Yes	No	No	No
sex activity	Yes	No	No	No

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

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

lechery (noun)	sex activity (noun)
unrestrained indulgence in sexual activity	activities associated with sexual intercourse