1 syllable:
blush, brush, busche, crush, cush, dousche, dusch, dusche, dush, flush, frush, grush, gush, husch, hush, jeush, krrish, krush, kusch, lusch, lush, musch, mush, nusz, plush, pngcrush, pusch, quish, rusch, rusche, rush, rushe, slush, smush, thrush, trush, tusche, zbrush, busch, bush, kush, push, smosh, tush

2 syllables:
ablush, aflush, airbrush, alush, ant-thrush, ant thrush, ayush, brainrush, broad-brush, brown thrush, buckbrush, bud brush, clothesbrush, deathcrush, downrush, dustbrush, four-flush, four flush, fruit crush, gold rush, hairbrush, hard rush, hush-hush, inrush, kneebrush, onrush, outblush, outgush, outrush, paintbrush, quail brush, redbrush, rimush, ring thrush, sagebrush, sage brush, salt rush, scratchbrush, scrub brush, shoebrush, snowbrush, soft rush, song thrush, spike rush, straight flush, toad rush, upgush, uprush, wood thrush, ambush, ankush, bell push, bluebush, cost-push, cush-cush, fire-bush, flame bush, flatbush, forbush, fringe bush, furbush, george bush, george w. bush, highbush, jeb bush, jew-bush, jewbush, jew bush, matchbush, maybush, quail bush, quince bush, rosebush, saltbush, shadbush, skunkbush, smoke bush, snowbush, spicebush, spice bush, squaw-bush, tarbush, wedbush, winbush

3 syllables:
at first blush, big sagebrush, bitterbrush, bottlebrush, bristle brush, bud sagebrush, common rush, cornmeal mush, cotton rush, crushcrushcrush, dandy-brush, hermit thrush, jointed rush, livermush, missel thrush, mocking thrush, needle rush, overflush, paper rush, rabbitbrush, rabbit brush, royal flush, scrubbing brush, shaving brush, slender rush, underbrush, waterthrush, water thrush, wilson's thrush, with a rush, beach plum bush, beauty bush, bramble bush, brittlebush, brittle bush, burning-bush, burning bush, caper-bush, christmas bush, coral bush, cori bush, daisy-bush, daisybush, daisy bush, eggplant bush, enambush, federbush, fetterbush, fetter bush, firebush, flannelbush, flannel bush, guava bush, hindu kush, hobblebush, hog plum bush, hopplebush, lawyer bush, minniebush, minnie bush, namaycush, needle-bush, needlebush, needle bush, pepper bush, poison bush, quackenbush, rabbit bush, rainbow/push, ritterbusch, scarlet bush, schimmelbusch, silver-bush, stagger bush, steeplebush, sugar-bush, tanglebush

4 syllables:
coyote brush, creeping spike rush, desert paintbrush, great plains paintbrush, mistletoe thrush, needle spike rush, scouring rush, silver sagebrush, slender spike rush, sulfur paintbrush, anheuser-busch, benjamin-bush, benjamin bush, blackberry bush, blueberry bush, butterfly bush, calico bush, coyote bush, cranberry bush, creosote bush, dewberry bush, gooseberry bush, juniper bush, marmalade bush, mimosa bush, raspberry bush, sophia bush, stingaree-bush, strawberry bush

5 syllables:
giant red paintbrush, indian paintbrush, george h. w. bush, hoary golden bush

6 syllables:
california sagebrush, chilean firebush, george herbert walker bush

8 syllables:
american cranberry bush, european cranberry bush