Gums are natural polysaccharides made of long chains of simple sugars. Plants usually produce gums when they get injured or stressed, which is why they come out as a sticky, water-soluble substance. 

Some common examples are gum arabic, guar gum, and xanthan gum, and they are used in foods, medicines, and even textile printing.

Fevicol, however, is not a natural gum. It is a synthetic adhesive made from polyvinyl acetate (PVA), which is a man-made polymer. Unlike plant gums, Fevicol forms a strong, durable bond and is mainly used for woodwork, paper, and craft materials.

So in simple words:

• Gums - natural carbohydrate-based adhesives
• Fevicol - synthetic PVA-based adhesive

So, while both stick, gums are natural carbohydrates, and Fevicol is a man-made polymer used mainly in bonding wood, paper, and plastics.