anlage vs primordium

anlage and primordium both are nouns.

Word	Noun	Adjective	Verb	Adverb
anlage	Yes	No	No	No
primordium	Yes	No	No	No

As nouns, anlage and primordium are synonyms defined as:

anlage and primordium: an organ in its earliest stage of development; the foundation for subsequent development

anlage (noun)	primordium (noun)
an organ in its earliest stage of development; the foundation for subsequent development	an organ in its earliest stage of development; the foundation for subsequent development