The letters in HELPING make 57 words of two letters or more. The longest is HELPING at 7 letters, and the highest-scoring is HELPING at 13 points.
No other single word uses all 7 letters of HELPING. HELPING has 7 letters: 2 vowels and 5 consonants, worth 13 points before any board bonuses.
7-letter words 1
5-letter words 4
genip8hinge9ingle6neigh9
4-letter words 15
elhi7gien5glen5heil7help9lien4line4ling5nigh8pein6peng7pile6pine6ping7plie6
3-letter words 26
eng4gel4gen4ghi7gie4gin4gip6hen6hep8hie6hin6hip8leg4lei3lie3lin3lip5nil3nip5peg6peh8pen5phi8pie5pig6pin5
2-letter words 11
eh5el2en2he5hi5in2li2ln2ne2pe4pi4
Words are from our open word list and include some game-only words. Rude words are left out of this page; the unscrambler shows every valid word, lets you add blank tiles and filter by length.