3 syllables:
favoring, flavoring, flavouring, quavering, savoring, savouring, slavering, wavering, yeavering

4 syllables:
beslavering, disfavoring, palavering, unwavering

2 syllables:
shoring, sparing, scoring, boring, hearing, barring, daring, staring, erring, sharing, stirring, rearing, soaring, caring, tiring, wearing, cheering, 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, clearing, sparring, gearing, roaring

3 syllables:
outpouring, veneering, incurring, rehearing, imploring, aspiring, despairing, repairing, appearing, inspiring, comparing, referring, transferring, adoring, endearing, red herring, exploring, expiring, ball bearing, retiring, lake herring, restoring, towering, thrust bearing, acquiring, time sharing, perspiring, recurring, untiring, unsparing, uncaring, unerring, declaring, concurring, catering, laboring, labouring, neighboring, neighbouring, papering, tailoring, tapering, vaporing

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

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