parallelogram vs rhomb

parallelogram and rhomb both are nouns.

Word	Noun	Adjective	Verb	Adverb
parallelogram	Yes	No	No	No
rhomb	Yes	No	No	No

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

parallelogram: a quadrilateral whose opposite sides are both parallel and equal in length
rhomb: a parallelogram with four equal sides; an oblique-angled equilateral parallelogram

Other hyponyms of parallelogram include diamond, rhombus, rhomboid, rectangle.

parallelogram (noun)	rhomb (noun)
a quadrilateral whose opposite sides are both parallel and equal in length	a parallelogram with four equal sides; an oblique-angled equilateral parallelogram