swob vs dust mop

swob and dust mop both are nouns.

Word	Noun	Adjective	Verb	Adverb
swob	Yes	No	Yes	No
dust mop	Yes	No	No	No

As nouns, dust mop is a hyponym of swob; that is, dust mop is a word with a more specific, narrower meaning than swob:

swob: cleaning implement consisting of absorbent material fastened to a handle; for cleaning floors
dust mop: a dry swab for dusting floors

Other hyponyms of swob include dry mop, dustmop, sponge mop.

swob (noun)	dust mop (noun)
cleaning implement consisting of absorbent material fastened to a handle; for cleaning floors	a dry swab for dusting floors

swob (verb)	dust mop (verb)
wash with a swab or a mop
apply (usually a liquid) to a surface