genuflexion vs obeisance

genuflexion and obeisance both are nouns.

Word	Noun	Adjective	Verb	Adverb
genuflexion	Yes	No	No	No
obeisance	Yes	No	No	No

As nouns, obeisance is a hypernym of genuflexion; that is, obeisance is a word with a broader meaning than genuflexion:

genuflexion: the act of bending the knees in worship or reverence
obeisance: bending the head or body or knee as a sign of reverence or submission or shame or greeting

Other hypernyms of genuflexion include bow, bowing.

genuflexion (noun)	obeisance (noun)
the act of bending the knees in worship or reverence	the act of obeying; dutiful or submissive behavior with respect to another person
	bending the head or body or knee as a sign of reverence or submission or shame or greeting