sphecoid vs digger wasp

sphecoid and digger wasp both are nouns.

Word	Noun	Adjective	Verb	Adverb
sphecoid	Yes	No	No	No
digger wasp	Yes	No	No	No

As nouns, digger wasp is a hyponym of sphecoid; that is, digger wasp is a word with a more specific, narrower meaning than sphecoid:

sphecoid: any of various solitary wasps
digger wasp: solitary wasp that digs nests in the soil and stocks them with paralyzed insects for the larvae

Other hyponyms of sphecoid include mason wasp, mud dauber.

sphecoid (noun)	digger wasp (noun)
any of various solitary wasps	solitary wasp that digs nests in the soil and stocks them with paralyzed insects for the larvae