puppet ruler vs ruler

puppet ruler and ruler both are nouns.

Word	Noun	Adjective	Verb	Adverb
puppet ruler	Yes	No	No	No
ruler	Yes	No	No	No

As nouns, ruler is a hypernym of puppet ruler; that is, ruler is a word with a broader meaning than puppet ruler:

puppet ruler: a leader or ruler who is chosen by a despot to head a government
ruler: a person who rules or commands

Other hypernyms of puppet ruler include leader, swayer.

puppet ruler (noun)	ruler (noun)
a leader or ruler who is chosen by a despot to head a government	measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths
	a person who rules or commands