Captain Hicks vs half a dozen

Captain Hicks and half a dozen both are nouns.

Word	Noun	Adjective	Verb	Adverb
Captain Hicks	Yes	No	No	No
half a dozen	Yes	No	No	No

As nouns, Captain Hicks and half a dozen are synonyms defined as:

Captain Hicks and half a dozen: the cardinal number that is the sum of five and one

Other synonyms of Captain Hicks include 6, hexad, sestet, sextet, sextuplet, sise, six, sixer, VI.

Captain Hicks (noun)	half a dozen (noun)
the cardinal number that is the sum of five and one	the cardinal number that is the sum of five and one