sire vs beget

sire is a noun but beget is not a noun.

Word	Noun	Adjective	Verb	Adverb
sire	Yes	No	Yes	No
beget	No	No	Yes	No

As verbs, sire and beget are synonyms defined as:

Other synonyms of sire include bring forth, engender, father, generate, get, mother.

sire (noun)	beget (noun)
male parent of an animal especially a domestic animal such as a horse
the founder of a family
a title of address formerly used for a man of rank and authority

sire (verb)	beget (verb)
make (offspring) by reproduction	make (offspring) by reproduction