massicot vs massicotite

massicot and massicotite both are nouns.

Word	Noun	Adjective	Verb	Adverb
massicot	Yes	No	No	No
massicotite	Yes	No	No	No

As nouns, massicot and massicotite are synonyms defined as:

massicot and massicotite: the mineral form of lead monoxide; in the form of yellow powder it is used as a pigment

massicot (noun)	massicotite (noun)
the mineral form of lead monoxide; in the form of yellow powder it is used as a pigment	the mineral form of lead monoxide; in the form of yellow powder it is used as a pigment