thymidine vs nucleoside

thymidine and nucleoside both are nouns.

Word	Noun	Adjective	Verb	Adverb
thymidine	Yes	No	No	No
nucleoside	Yes	No	No	No

As nouns, nucleoside is a hypernym of thymidine; that is, nucleoside is a word with a broader meaning than thymidine:

thymidine: a nucleoside component of DNA; composed of thymine and deoxyribose
nucleoside: a glycoside formed by partial hydrolysis of a nucleic acid

thymidine (noun)	nucleoside (noun)
a nucleoside component of DNA; composed of thymine and deoxyribose	a glycoside formed by partial hydrolysis of a nucleic acid