1 syllable:
sbirs

2 syllables:
cbirs

1 syllable:
cares, airs, stairs, shares, chairs, mars, clears, beers, heirs, tours, wars, shears, cheers, drawers, ares, squares, cars, gears, corps, pairs, peers, scores, stars, furze, yours, tears, bears, bars, stores, wares, doors, fears, years, ers, theirs, hairs, ears, cures, hers, car's, chores, fares, floors, fours, gerres, gore's, hears, here's, poor's, prayers, r.'s, r.s, scares, scars, sears, shores, slurs, smears, star's, there's, war's, wears, where's, year's, years'

2 syllables:
job's tears, hours, fires, outdoors, least squares, wires, repairs, upstairs, downstairs, all fours, affairs, algiers, ours, hires, azores, appears, careers, cigars, compares, declares, explores, frontiers, guitars, ignores, inspires, new year's, occurs, pig's ears, prefers, prepares, raptores, refers, requires, small stores, tangiers, transfers, velours, weltschmerz

3 syllables:
rabbit ears, out of doors, common shares, intra vires, charge d'affaires, in arrears, kick upstairs, chest of drawers, stars and bars, pruning shears, unawares, ultra vires, volunteers, preferred shares, baby's tears, baby tears, balkan wars, disappears, down the stairs, engineers, flight of stairs, golden stars, helicteres, in both ears, kick downstairs, millionaires, npr's, out-of-doors, pinnotheres, pioneers, punic wars, put on airs, questionnaires, souvenirs, superstars, to both ears, underscores, up the stairs, world affairs

4 syllables:
authorized shares, preference shares, treasury shares, state of affairs, musical chairs, parallel bars, entrepreneurs, man of affairs, put behind bars, sincerely yours

5 syllables:
music of the spheres, ordinary shares, anterior nares, elegant cat's ears, method of least squares, posterior nares, wet behind the ears

6 syllables:
napoleonic wars

7 syllables:
international affairs, master in public affairs, veterans of foreign wars

9 syllables:
department of veterans affairs

10 syllables:
secretary of veterans affairs