Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun leaven

2 senses of leaven

Sense 1
leaven, leavening -- (a substance used to produce fermentation in dough or a liquid)
       => substance -- (a particular kind or species of matter with uniform properties; "shigella is one of the most toxic substances known to man")

Sense 2
leaven, leavening -- (an influence that works subtly to lighten or modify something; "his sermons benefited from a leavening of humor")
       => imponderable -- (a factor whose effects cannot be accurately assessed; "human behavior depends on many imponderables")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb leaven

1 sense of leaven

Sense 1
raise, leaven, prove -- (cause to puff up with a leaven; "unleavened bread")
       => raise, lift, elevate, get up, bring up -- (raise from a lower to a higher position; "Raise your hands"; "Lift a load")