dose vs o.d.

dose is a noun but o.d. is not a noun.

Word	Noun	Adjective	Verb	Adverb
dose	Yes	No	Yes	No
o.d.	No	No	Yes	No

As verbs, o.d. is a hyponym of dose; that is, o.d. is a word with a more specific, narrower meaning than dose:

dose (noun)	o.d. (noun)
a measured portion of medicine taken at any one time
street name for lysergic acid diethylamide
the quantity of an active agent (substance or radiation) taken in or absorbed at any one time
a communicable infection transmitted by sexual intercourse or genital contact

dose (verb)	o.d. (verb)
administer a drug to	dose too heavily
treat with an agent; add (an agent) to