bench vs lab bench

bench and lab bench both are nouns.

Word	Noun	Adjective	Verb	Adverb
bench	Yes	No	Yes	No
lab bench	Yes	No	No	No

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

Other hyponyms of bench include laboratory bench, woodworking bench.

bench (noun)	lab bench (noun)
a long seat for more than one person	a workbench in a laboratory
a strong worktable for a carpenter or mechanic
(law) the seat for judges in a courtroom
persons who administer justice
the reserve players on a team
a level shelf of land interrupting a declivity (with steep slopes above and below)

bench (verb)	lab bench (verb)
To lift a weight using a bench press
To exercise using a bench press
exhibit on a bench
take out of a game; of players