duckweed

As nouns the difference between duckweed and blanketweed

is that duckweed is any of several reduced floating aquatic plants in the subfamily of the family araceae while blanketweed is a filamentous alga often found in ponds.

As nouns the difference between ragweed and duckweed

is that ragweed is a plant of the genus ambrosia these weeds are particularly noted for producing pollen which people with hay fever are allergic to while duckweed is any of several reduced floating aquatic plants in the subfamily of the family araceae .

As nouns the difference between dickweed and duckweed

is that dickweed is an undesirable person while duckweed is any of several reduced floating aquatic plants in the subfamily subfamily: Lemnoideae of the family Araceae.

As nouns the difference between duckweed and duckmeat

is that duckweed is any of several reduced floating aquatic plants in the subfamily of the family araceae while duckmeat is (archaic) duckweed.