ammonite vs ammonoid

ammonite and ammonoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
ammonite	Yes	No	No	No
ammonoid	Yes	No	No	No

As nouns, ammonite and ammonoid are synonyms defined as:

ammonite and ammonoid: one of the coiled chambered fossil shells of extinct mollusks

ammonite (noun)	ammonoid (noun)
one of the coiled chambered fossil shells of extinct mollusks	one of the coiled chambered fossil shells of extinct mollusks