Canvass and Velum

Canvass noun - An inquiry into public opinion conducted by interviewing a random sample of people.

Velum and canvass are semantically related. In some cases you can use "Velum" instead a noun "Canvass".

Velum noun - A membranous covering attached to the immature fruiting body of certain mushrooms.

Canvass and velum are semantically related. Sometimes you can replace term "Canvass" with "Velum", this nouns are similar.