anise seed vs aniseed

anise seed and aniseed both are nouns.

Word	Noun	Adjective	Verb	Adverb
anise seed	Yes	No	No	No
aniseed	Yes	No	No	No

As nouns, anise seed and aniseed are synonyms defined as:

anise seed and aniseed: liquorice-flavored seeds, used medicinally and in cooking and liquors

Other synonyms of anise seed include anise.

anise seed (noun)	aniseed (noun)
liquorice-flavored seeds, used medicinally and in cooking and liquors	liquorice-flavored seeds, used medicinally and in cooking and liquors