home base vs plural form

home base and plural form both are nouns.

Word	Noun	Adjective	Verb	Adverb
home base	Yes	No	No	No
plural form	Yes	No	No	No

home base (noun)	plural form (noun)
(usually plural) the office that serves as the administrative center of an enterprise	the form of a word that is used to denote more than one
(baseball) base consisting of a rubber slab where the batter stands; it must be touched by a base runner in order to score