apple polisher vs sycophant

apple polisher and sycophant both are nouns.

Word	Noun	Adjective	Verb	Adverb
apple polisher	Yes	No	No	No
sycophant	Yes	No	No	No

As nouns, sycophant is a hypernym of apple polisher; that is, sycophant is a word with a broader meaning than apple polisher:

apple polisher: someone who humbles himself as a sign of respect; who behaves as if he had no self-respect
sycophant: a person who tries to please someone in order to gain a personal advantage

Other hypernyms of apple polisher include ass-kisser, crawler, lackey, toady.

apple polisher (noun)	sycophant (noun)
someone who humbles himself as a sign of respect; who behaves as if he had no self-respect	a person who tries to please someone in order to gain a personal advantage