-ING is the most productive suffix in English — nearly every verb can take it. It forms present participles (she is RUNNING) and gerunds (SWIMMING is fun). From 4-letter plays like KING to 10-letter words like EVERYTHING, -ING words are everywhere in Scrabble, Wordle, and crosswords.
The suffix -ING has two jobs. As a present participle, it shows an action in progress and pairs with a form of "to be" — "they are WORKING," "it is RAINING." As a gerund, the same -ING form works as a noun — "READING improves vocabulary," "I love COOKING." Because it attaches to virtually any verb, -ING is the single most common word-ending in English, which is why a full dictionary contains close to 19,000 of them.
6-letter -ING words
7-letter -ING words
8-letter -ING words
-ING turns a verb into a present participle (an action in progress: "she is RUNNING") or a gerund (a verb acting as a noun: "SWIMMING is fun"). Nearly every English verb can take -ING, making it the most common word-ending in the language.
Drop a silent E (MAKE → MAKING), double a final consonant after a short stressed vowel (RUN → RUNNING, SWIM → SWIMMING), and change -IE to -Y (DIE → DYING, LIE → LYING). Otherwise just add -ING (READ → READING).
Words with premium tiles before -ING score highest: QUIZZING (34 pts), BUZZING (28 pts), JUMPING (21 pts), JOKING (17 pts), ZONING (16 pts), WAXING (16 pts), BOXING (15 pts). Any 7-letter -ING word that empties your rack also earns the 50-point bingo bonus.
Common 5-letter -ING words: BEING, BRING, CLING, DOING, DYING, FLING, GOING, LYING, SLING, STING, SWING, THING, WRING. These are handy for Wordle and as quick, high-frequency Scrabble plays.