hiccup vs plural form

hiccup and plural form both are nouns.

Word	Noun	Adjective	Verb	Adverb
hiccup	Yes	No	Yes	No
plural form	Yes	No	No	No

hiccup (noun)	plural form (noun)
(usually plural) the state of having reflex spasms of the diaphragm accompanied by a rapid closure of the glottis producing an audible sound; sometimes a symptom of indigestion	the form of a word that is used to denote more than one

hiccup (verb)	plural form (verb)
breathe spasmodically, and make a sound