3 syllables:
bowering, cowering, flowering, glowering, louring, powering, scouring, showering, souring, towering

4 syllables:
deflouring, deflowering, devouring, embowering, empowering, enflowering, fall-flowering, late-flowering, nonflowering, offscouring

5 syllables:
all-devouring, autumn-flowering, disempowering, early-flowering, self-devouring, winter-flowering

2 syllables:
shoring, sparing, scoring, boring, during, hearing, barring, daring, staring, erring, sharing, stirring, rearing, soaring, caring, mooring, tiring, wearing, cheering, curing, snoring, swearing, earring, pairing, meringue, herring, airing, firing, whirring, jeering, veering, wiring, blaring, raring, pouring, steering, bearing, hiring, sneering, baring, glaring, warring, paring, jarring, spurring, fearing, shirring, furring, flooring, flaring, shearing, tearing, storing, starring, touring, clearing, sparring, gearing, roaring

3 syllables:
insuring, outpouring, veneering, incurring, rehearing, enduring, securing, imploring, aspiring, despairing, repairing, appearing, inspiring, comparing, alluring, referring, transferring, assuring, flavouring, adoring, endearing, red herring, exploring, expiring, ball bearing, retiring, lake herring, restoring, thrust bearing, acquiring, time sharing, perspiring, recurring, untiring, unsparing, uncaring, unerring, maturing, declaring, concurring

4 syllables:
journal bearing, volunteering, overbearing, domineering, umpiring, power steering, reassuring, buccaneering, interfering, profit sharing, engineering, disappearing, uninspiring, roller bearing, persevering, racketeering

5 syllables:
electioneering

6 syllables:
civil engineering, bioengineering

7 syllables:
genetic engineering, chemical engineering, administrative hearing

8 syllables:
electrical engineering, mechanical engineering

9 syllables:
aeronautical engineering