riddle vs pose

riddle and pose both are nouns.

Word	Noun	Adjective	Verb	Adverb
riddle	Yes	No	Yes	No
pose	Yes	No	Yes	No

As verbs, pose is a hypernym of riddle; that is, pose is a word with a broader meaning than riddle:

Other hypernyms of riddle include amaze, baffle, beat, bewilder, dumbfound, flummox, get, gravel, mystify, nonplus, perplex, puzzle, stick, stupefy, vex.

riddle (noun)	pose (noun)
a coarse sieve (as for gravel)	a deliberate pretense or exaggerated display
a difficult problem	affected manners intended to impress others
	a posture assumed by models for photographic or artistic purposes

riddle (verb)	pose (verb)
explain a riddle	be a mystery or bewildering to
set a difficult problem or riddle	pretend to be someone you are not; sometimes with fraudulent intentions
speak in riddles	put into a certain place or abstract location
pierce with many holes	assume a posture as for artistic purposes
separate with a riddle, as grain from chaff	behave affectedly or unnaturally in order to impress others
spread or diffuse through	offer for others to consider