Enter criteria and click Find Words
I first and T third gives 15 words, and more than half of them open with INT.
N takes about fifty three percent of the box between. C and S follow at thirteen each, and the rest is single entries.
INTER, INTRO and INTRA share their first four letters and differ only at the end, so a hit on INTR leaves three words standing.
IOTAS is the O branch entry, ICTUS the C branch, and ISTLE and IXTLE are plant fibre names on two more.
INTRO is the sensible opener. It covers the dominant shape and its O tests a box the other two INT words fill differently.
If INTR comes back complete, the answer is one of three words and a single letter decides it.
No. ITEMS puts T in the second box and E in the third. The T needs to sit one place later.
INTER turns up more in formal writing and INTRO more in speech. Neither is a safe assumption, so the last box has to be guessed rather than reasoned.
Yes, it is the plural of iota. It is the only common word here outside the INT shape, which makes it the natural fallback.