The letters in NECESSITY make 183 words of two letters or more. The longest is CYSTEINES at 9 letters, and the highest-scoring is CYSTEINES at 14 points.
NECESSITY is an anagram of CYSTEINES, using all 9 letters. NECESSITY has 9 letters: 3 vowels and 6 consonants, worth 14 points before any board bonuses.
Anagrams of NECESSITY 1
cysteines14
9-letter words 2
cysteines14necessity14
8-letter words 5
centesis10cysteine13cysteins13cystines13syenites11
7-letter words 7
cystein12cystine12encysts12entices9insects9sestine7syenite10
6-letter words 19
censes8cyeses11cyesis11ecesis8encyst11entice8insect8insets6nicest8nicety11nieces8scenes8scents8seines6steins6sycees11teensy9tenses6yentes9
5-letter words 44
cense7cents7cesti7cetes7cines7cissy10cists7cites7cysts10inset5neist5nests5niece7nites5scene7scent7sects7seine5seise5sense5sente5senti5sices7since7sines5sites5snits5snyes8stein5sties5styes8sycee10syces10syncs10teens5teeny8tense5tines5tyees8tynes8yente8yeses8yetis8yince10
4-letter words 59
cees6cent6cess6cete6cine6cist6cite6city9cyst9eses4esse4etic6eyen7eyes7eyne7ices6ness4nest4nets4nice6nite4nits4secs6sect6seen4sees4seis4sene4sens4sent4sets4sice6sics6sine4sins4site4sits4snit4snye7stey7stye7syce9sync9syne7teen4tees4tens4tics6ties4tine4tins4tiny7tyee7tyes7tyne7yens7yest7yeti7yins7
3-letter words 34
cee5cis5ens3ess3eye6ice5icy8ins3its3nee3net3nit3sec5see3sei3sen3set3sic5sin3sis3sit3sty6syn6tee3ten3tic5tie3tin3tis3tye6yen6yes6yet6yin6
2-letter words 13
cs4en2es2et2in2is2it2ne2si2ss2ti2ts2ye5
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.