sycophant vs groveler

sycophant and groveler both are nouns.

Word	Noun	Adjective	Verb	Adverb
sycophant	Yes	No	No	No
groveler	Yes	No	No	No

As nouns, groveler is a hyponym of sycophant; that is, groveler is a word with a more specific, narrower meaning than sycophant:

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

Other hyponyms of sycophant include apple polisher, bootlicker, fawner, groveller, truckler, goody-goody.

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