cyanamide vs cyanamid

cyanamide and cyanamid both are nouns.

Word	Noun	Adjective	Verb	Adverb
cyanamide	Yes	No	No	No
cyanamid	Yes	No	No	No

As nouns, cyanamide and cyanamid are synonyms defined as:

cyanamide and cyanamid: a weak soluble dibasic acid (the parent acid of cyanamide salts)

cyanamide (noun)	cyanamid (noun)
a weak soluble dibasic acid (the parent acid of cyanamide salts)	a weak soluble dibasic acid (the parent acid of cyanamide salts)
a compound used as a fertilizer and as a source of nitrogen compounds