1 syllable:
berth, birth, birthe, cirth, 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, 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

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

8 syllables:
list of royalty by net worth