pungapung vs arum

pungapung and arum both are nouns.

Word	Noun	Adjective	Verb	Adverb
pungapung	Yes	No	No	No
arum	Yes	No	No	No

As nouns, arum is a hypernym of pungapung; that is, arum is a word with a broader meaning than pungapung:

pungapung: putrid-smelling aroid of southeastern Asia (especially the Philippines) grown for its edible tuber
arum: any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe

Other hypernyms of pungapung include aroid.

pungapung (noun)	arum (noun)
putrid-smelling aroid of southeastern Asia (especially the Philippines) grown for its edible tuber	any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe
	starch resembling sago that is obtained from cuckoopint root