Peanut and Watermelon

Peanut noun - Widely cultivated American plant cultivated in tropical and warm regions; showy yellow flowers on stalks that bend over to the soil so that seed pods ripen underground.

Watermelon and peanut are semantically related In some cases you can use "Watermelon" instead a noun "Peanut".

Watermelon noun - Large oblong or roundish melon with a hard green rind and sweet watery red or occasionally yellowish pulp.

Peanut and watermelon are semantically related in ball used in football topic. Sometimes you can use "Peanut" instead a noun "Watermelon".