tweezer vs roach holder

tweezer and roach holder both are nouns.

Word	Noun	Adjective	Verb	Adverb
tweezer	Yes	No	No	No
roach holder	Yes	No	No	No

As nouns, roach holder is a hyponym of tweezer; that is, roach holder is a word with a more specific, narrower meaning than tweezer:

tweezer: a hand tool for holding consisting of a compound lever for grasping
roach holder: metal tweezers used by marijuana smokers to hold a roach

Other hyponyms of tweezer include roach clip.

tweezer (noun)	roach holder (noun)
a hand tool for holding consisting of a compound lever for grasping	metal tweezers used by marijuana smokers to hold a roach