tam vs tammy

tam and tammy both are nouns.

Word	Noun	Adjective	Verb	Adverb
tam	Yes	No	No	No
tammy	Yes	No	No	No

As nouns, tam and tammy are synonyms defined as:

Other synonyms of tam include tam-o'-shanter.

tam (noun)	tammy (noun)
a woolen cap of Scottish origin	plain-woven (often glazed) fabric of wool or wool and cotton used especially formerly for linings and garments and curtains
	a woolen cap of Scottish origin