1 syllable:
berth, birth, birthe, dearth, derth, dirth, earth, firth, fuerth, furth, gerth, girth, hirth, kerth, kurth, mirth, mirthe, murth, perth, tirth, werth, wirth, worth, wurth, yearth

2 syllables:
ashworth, at birth, beckworth, bedworth, bloodsworth, bloodworth, breech birth, brickearth, brockworth, burnsworth, burnworth, chatsworth, childbirth, cross-birth, cudworth, cutbirth, dillworth, ducksworth, duckworth, dunsworth, dunworth, elsworth, flat-earth, fort worth, foxearth, foxworth, give birth, hackworth, handsworth, hayworth, heyworth, holdsworth, holmfirth, homebirth, houseworth, inearth, isleworth, kenworth, keyworth, live birth, longsworth, longworth, molesworth, networth, outworth, petworth, pickworth, pro-birth, rare earth, rebirth, rushworth, self-worth, sick berth, simearth, skipworth, stallworth, stillbirth, tadworth, tamworth, tidworth, titsworth, transperth, unearth, unworth, wandsworth, wedgeworth, wentworth, whitworth, wirksworth, woodworth, woolworth

3 syllables:
active birth, after-birth, afterbirth, after earth, antibirth, bleaching earth, butterworth, counter-earth, down-to-earth, ellingsworth, express mirth, fuller's earth, given birth, giving birth, hackerearth, harmondsworth, hell on earth, hollandsworth, hollingsworth, hollingworth, hollinsworth, illingworth, kenilworth, killingsworth, killingworth, leavenworth, lower berth, lutterworth, middlesworth, place of birth, potter's earth, rudge-whitworth, saddleworth, sawbridgeworth, shuttlesworth, shuttleworth, super-earth, undermirth, upper berth, virgin birth, wigglesworth

4 syllables:
alkaline earth, crisis on earth-x, gall-of-the-earth, gall of the earth, man-of-the-earth, nap-of-the-earth, star-of-the-earth, tammy duckworth, vaginal birth

5 syllables:
alternative birth, atmosphere of earth, gravity of earth, history of earth, natural childbirth

6 syllables:
celebritynetworth, read method of childbirth, spiritual rebirth, the pillars of the earth, woolsthorpe-by-colsterworth

7 syllables:
bradley method of childbirth

8 syllables:
list of royalty by net worth

1 syllable:
forth, fourth, garth, hearth, njorth, north

2 syllables:
bring forth, burst forth, call forth, come forth, due north, give forth, go forth, henceforth, pour forth, set forth, stretch forth, thenceforth

3 syllables:
and so forth, back and forth, blossom forth, body forth, burgeon forth, compass north, east by north, in the north, issue forth, sally forth, to the north, west by north

4 syllables:
magnetic north, move back and forth, northeast by north, northwest by north

5 syllables:
travel back and forth