mannikin vs homunculus

mannikin and homunculus both are nouns.

Word	Noun	Adjective	Verb	Adverb
mannikin	Yes	No	No	No
homunculus	Yes	No	No	No

As nouns, mannikin and homunculus are synonyms defined as:

mannikin and homunculus: a person who is very small but who is not otherwise deformed or abnormal

Other synonyms of mannikin include manikin.

mannikin (noun)	homunculus (noun)
a life-size dummy used to display clothes	a person who is very small but who is not otherwise deformed or abnormal
a person who is very small but who is not otherwise deformed or abnormal	a tiny fully formed individual that (according to the discredited theory of preformation) is supposed to be present in the sperm cell
a woman who wears clothes to display fashions