What are the rules for nouns to become adjectives?

1, adding -y after nouns can become adjectives, especially some weather-related nouns.

For example: rain-rain, cloudy-cloudy, windy-windy, snowy-snowy.

2. Adding-less after a noun constitutes an adjective with negative meaning.

For example: care—-carelessness, use—-uselessness, hope—-hopelessness, home—-homelessness, e, some nouns ending in -ce, change -ce into -t and become adjectives.

For example: difference-difference, silence-silence, confidence-confidence.

3. Add -ly after nouns to become adjectives.

For example: friends-friendliness, love-loveliness, life-liveliness.

4. Add-ous after nouns to become adjectives.

For example, danger-danger

5. Add -al after nouns to become adjectives.

For example: music-musical; ; Medicine-medicine