plural form vs chain tongs

plural form and chain tongs both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural form	Yes	No	No	No
chain tongs	Yes	No	No	No

plural form (noun)	chain tongs (noun)
the form of a word that is used to denote more than one	a pipe wrench used for turning large pipes; an adjustable chain circles the pipe with its ends connected to the head whose teeth engage the pipe