Spread: spread around like a creeping weed.

Manyan: Manyan. Generally refers to spread everywhere.

2. Different sources:

Spread: Shen Congwen's "Crossing the Ridge": "Take the grass leaves of Duchesnea indica spreading underground at will ... and apply them on the soles of your feet with your hands."

Communication: Chapter 19 of Liu Qing's Iron Wall: "At the moment, the same slogan spreads."

3. Different usage:

Communication: it is a neutral word, such as: communication growth; The plague spread.

Manyan: a verb, often used as the center of the predicate in a sentence. Such as "the desert has spread to the distant horizon".