dike vs milldam

dike and milldam both are nouns.

Word	Noun	Adjective	Verb	Adverb
dike	Yes	No	Yes	No
milldam	Yes	No	No	No

As nouns, milldam is a hyponym of dike; that is, milldam is a word with a more specific, narrower meaning than dike:

dike: a barrier constructed to contain the flow of water or to keep out the sea
milldam: dam to make a millpond to provide power for a water mill

Other hyponyms of dike include weir.

dike (noun)	milldam (noun)
a barrier constructed to contain the flow of water or to keep out the sea	dam to make a millpond to provide power for a water mill
(slang) offensive term for a lesbian who is noticeably masculine

dike (verb)	milldam (verb)
enclose with a dike