Or search: employee, pensionary
2 Syllables: SU
firing, hirelings, hiring, ironing, tiring, wiring
3 Syllables: USU
acquiring, admiring, aspiring, conspiring, desiring, enquiring, expiring, inquiring, inspiring, perspiring, requiring, retiring
4 Syllables: USUU
deciphering

Found 19 words across 3 groupings.