purine vs A

purine and A both are nouns.

Word	Noun	Adjective	Verb	Adverb
purine	Yes	No	No	No
A	Yes	No	No	No

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

purine: any of several bases that are derivatives of purine
A: (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

Other hyponyms of purine include adenine, G, guanine.

purine (noun)	A (noun)
a colorless crystalline organic base containing nitrogen; the parent compound of various biologically important substances	the blood group whose red cells carry the A antigen
any of several bases that are derivatives of purine	the 1st letter of the Roman alphabet
	the basic unit of electric current adopted under the Systeme International d'Unites
	a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
	any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
	one of the four nucleotides used in building DNA, also known as deoxyadenylate, or dAMP; all four nucleotides have a common phosphate group and a sugar (ribose)
	(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

Difference between purine and A

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