trombiculid vs redbug

trombiculid and redbug both are nouns.

Word	Noun	Adjective	Verb	Adverb
trombiculid	Yes	No	No	No
redbug	Yes	No	No	No

As nouns, redbug is a hyponym of trombiculid; that is, redbug is a word with a more specific, narrower meaning than trombiculid:

trombiculid: mite that as nymph and adult feeds on early stages of small arthropods but whose larvae are parasitic on terrestrial vertebrates
redbug: larval mite that sucks the blood of vertebrates including human beings causing intense irritation

Other hyponyms of trombiculid include chigger, harvest mite, jigger.

trombiculid (noun)	redbug (noun)
mite that as nymph and adult feeds on early stages of small arthropods but whose larvae are parasitic on terrestrial vertebrates	larval mite that sucks the blood of vertebrates including human beings causing intense irritation