is a specific kind of: class, social class, socio-economic class, stratum.

is a broader term that covers: labor force, labor pool | lumpenproletariat | organized labor.

has as a member: prole, proletarian, worker.

derivation: proletarian.

is a specific kind of: birth, birthing, giving birth, parturition.

is a broader term that covers: premature labor, premature labour.

has as a part: uterine contraction | effacement | asynclitism, obliquity.

is a part of: gestation, maternity, pregnancy.

derivation: labor, labour | parturient | parturient.

is a specific kind of: labor party, labour party.

has as a member: Labourite.

is a specific kind of: work.

is a broader term that covers: roping | corvee | donkeywork, drudgery, grind, plodding | effort, elbow grease, exertion, sweat, travail | hunt, hunting | hackwork | haymaking | manual labor, manual labour | overwork, overworking | slavery.

derivation: drive, labor, labour, push, tug | dig, drudge, fag, grind, labor, labour, moil, toil, travail | arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome.

is a specific kind of: do work, work.

derivation: labor, labour, toil | donkeywork, drudgery, grind, plodding | effort, elbow grease, exertion, sweat, travail | labor, project, task, undertaking | drudge, galley slave, navvy, peon | drudge, hack, hacker | jack, laborer, labourer, manual laborer | dweeb, grind, nerd, swot, wonk | toiler.

is a specific kind of: fight, struggle.

is a broader term that covers: reach, strain, strive.

verb group: bear on, push.

see also: plough on, press on, push on.

derivation: labor, labour, toil | labor, project, task, undertaking | campaign, cause, crusade, drive, effort, movement | energy, get-up-and-go, push | jack, laborer, labourer, manual laborer.

is a specific kind of: undergo.

entailment: bear, birth, deliver, give birth, have.

derivation: childbed, confinement, labor, labour, lying-in, parturiency, travail.