flatterer vs sycophant

flatterer and sycophant both are nouns.

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

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

flatterer: a person who uses flattery
sycophant: a person who tries to please someone in order to gain a personal advantage

Other hyponyms of flatterer include ass-kisser, crawler, lackey, toady.

flatterer (noun)	sycophant (noun)
a person who uses flattery	a person who tries to please someone in order to gain a personal advantage