Potamogetonaceae vs pondweed family

Potamogetonaceae and pondweed family both are nouns.

Word	Noun	Adjective	Verb	Adverb
Potamogetonaceae	Yes	No	No	No
pondweed family	Yes	No	No	No

As nouns, Potamogetonaceae and pondweed family are synonyms defined as:

Potamogetonaceae and pondweed family: plants that grow in ponds and slow streams; sometimes includes family Zosteraceae

Other synonyms of Potamogetonaceae include family Potamogetonaceae.

Potamogetonaceae (noun)	pondweed family (noun)
plants that grow in ponds and slow streams; sometimes includes family Zosteraceae	plants that grow in ponds and slow streams; sometimes includes family Zosteraceae