Synonyms for Yeast:

n.

bakery, crusty, poppyseed, leavened, knead, bake. foam, solid, froth, spume, suds, head, lather. leavening, change, leaven, ferment, catalyst. bubble, effervesce, fizz, cream. bread (noun)
whole wheat bread, sweet roll, crumb, zwieback, crust, bread, rye bread, pumpernickel, bagel, scone, raisin bread, toast, biscuit, waffle, flour, croutons, donut, flapjack, sweet bun, pancake, banana bread, taco, bun, white-bread, sliced bread, roll, corn bread, brown bread, baguette, loaf, whole grain bread, bread-stick, pita bread, muffin, breakfast roll, cracker, rusk, dumpling, croissant, griddlecake, hard roll, tortilla, dough.
bubbles (noun)
lather.
foam (noun)
spume, lather.
leaven (noun)
ferment, enzyme, amylase, Zyme, fungus, Diastase, pepsin, catalyst.
leavening (noun)
leavening.
rising agent (noun)
leavening, foam, fungus, froth, catalyst.
yeast (noun)
barm.

Other synonyms:

leavening, enzyme. ferment, suds, foam, cream, froth, effervesce, spume, lather, bubble. leaven, catalyst. fizz. head. Other relevant words:
leavened, crusty, pepsin, barm, knead, spume, effervesce, Diastase, solid, fizz, bake, lather, bubble, amylase, fungus, froth, bakery, cream, suds, change, ferment, leavening, Zyme, foam, head, catalyst, poppyseed, enzyme, leaven.

Usage examples for yeast

  1. It will, however, be necessary to explain the new means of producing gas which is used in this particular mixture, namely, yeast – Ontario Teachers' Manuals: Household Management by Ministry of Education
  2. Two wine- glasses of the best brewer's yeast or three of good home- made yeast – Seventy-Five Receipts for Pastry Cakes, and Sweetmeats by Miss Leslie
  3. She is to save you from the tears and perplexities of flour and yeast and to make you the happy little lady of the house that you were before the wicked Phoebe went away. – The Girl at Cobhurst by Frank Richard Stockton