6-letter words with I as the 1st letter and S as the 2nd letter

The fixed opening IS narrows the search to a compact group: just 20 words appear across tournament dictionaries. Four count as common by the frequency measure, so familiar choices sit alongside less everyday entries such as ISOLEX and ISTHMI. The endings also spread across several letters, with S leading but not dominating the group.

How many 6-letter words have I first and S second?

• Collins has 20 six-letter entries beginning IS; ENABLE and NWL2023 each have 17.
• Only 4 of the 20 meet the common-word frequency measure.
• ISLAND, ISSUES, and ISSUED are among the recognisable entries.
• Final S appears in 4 words; D and R follow with 3 apiece.
• ISOLEX leads the score list at 13 points, ahead of ISCHIA and ISTHMI at 11.

Which IS words are familiar, and how do dictionaries differ?

ISLAND, ISSUES, ISSUED, and ISSUER make the pattern easier to scan than a run of obscure entries. These examples show how one opening can lead to different endings: island finishes in D, while issues and its related forms finish in S or R. The four common entries are a minority of the 20, so expect the rest to be less familiar.

Dictionary coverage changes the usable pool: Collins includes 20 entries, while ENABLE and NWL2023 each include 17. Those totals do not establish that the same individual words appear in both smaller lists. If a move depends on a particular entry, check your game's word list rather than assuming every Collins word transfers.

Which endings and scores stand out?

The ending pattern is more varied than the shared IS prefix suggests. S is the most frequent final letter, but only 4 words end that way; D and R each account for 3. The remaining entries finish in A, G, L, N, or I, giving you several routes when a board or puzzle fixes the last tile.

For a score-focused play, ISOLEX is the clear leader at 13 points, while ISCHIA and ISTHMI each score 11. ISOPOD and ISOHEL follow at 9 apiece. Those are letter-value totals, not a promise of the final board score: premium squares can change the result, and a high-value word still needs a legal placement.