loanword vs Grecism

loanword and Grecism both are nouns.

Word	Noun	Adjective	Verb	Adverb
loanword	Yes	No	No	No
Grecism	Yes	No	No	No

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

loanword: a word borrowed from another language; e.g. `blitz' is a German word borrowed into modern English
Grecism: a word or idiom of the Greek language used in another language, especially for literary effect.

Other hyponyms of loanword include Latinism, Gallicism, Yiddishism, Aramaicism, Aramaism.

loanword (noun)	Grecism (noun)
a word borrowed from another language; e.g. `blitz' is a German word borrowed into modern English	a word or idiom of the Greek language used in another language, especially for literary effect.