chain tongs vs plural form

chain tongs and plural form both are nouns.

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

chain tongs (noun)	plural form (noun)
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	the form of a word that is used to denote more than one