drunkard vs dipsomaniac

drunkard and dipsomaniac both are nouns.

Word	Noun	Adjective	Verb	Adverb
drunkard	Yes	No	No	No
dipsomaniac	Yes	No	No	No

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

Other hyponyms of drunkard include alcoholic, alky, boozer, lush, soaker, souse.

drunkard (noun)	dipsomaniac (noun)
a chronic drinker	a person who drinks alcohol to excess habitually