luffa vs sing-kwa

luffa and sing-kwa both are nouns.

Word	Noun	Adjective	Verb	Adverb
luffa	Yes	No	No	No
sing-kwa	Yes	No	No	No

As nouns, sing-kwa is a hyponym of luffa; that is, sing-kwa is a word with a more specific, narrower meaning than luffa:

luffa: any of several tropical annual climbers having large yellow flowers and edible young fruits; grown commercially for the mature fruit's dried fibrous interior that is used as a sponge
sing-kwa: loofah of Pakistan; widely cultivated throughout tropics

Other hyponyms of luffa include loofah, Luffa cylindrica, vegetable sponge, angled loofah, Luffa acutangula.

luffa (noun)	sing-kwa (noun)
any of several tropical annual climbers having large yellow flowers and edible young fruits; grown commercially for the mature fruit's dried fibrous interior that is used as a sponge	loofah of Pakistan; widely cultivated throughout tropics
the dried fibrous part of the fruit of a plant of the genus Luffa; used as a washing sponge or strainer