Brandable domains for
200 compound suggestions built around extension, scored on sound and fluency. Click any name to verify availability live against the .com zone file.
None of these .coms had been registered as of May 19, 2026 — our most recent .com zone-file snapshot. Click any name to confirm live at the registry.
Pairs extension with classical suffixes (-ex, -ius, -ium, -on), morphemes from the bank (ver-, lex-, pro-), and vowel mutations — then bloom-checks every candidate against the live .com zone file. Up to 400 candidates per click; only the available ones land here.
Semantic synonyms of extension. Synonyms with their own pre-built page jump straight in; the rest open the homepage primed for a fresh search.
Adjacent terms readers commonly look at next to extension. The extension prefix/suffix has been stripped where present, so extension timetable reads as timetable. Click any to start fresh from that seed.
Every suggestion above pairs extension with one of the 5,000 most common .com domain prefixes or suffixes. Each compound is then scored on three things naming agencies care about:
Sound symbolism — Yorkston and Menon's 2004 Stanford study showed front vowels make products feel smaller and faster. V is the most alive letter in English (Vercel, Corvette, vibrant). Z and S are noisy attention-getters (Sonos, Azure).
Processing fluency — familiar morpheme fragments ("ver", "cel", "son") get processed faster by your brain and feel more natural even when the full word is invented. We give credit for these.
Compound multiplier — two real words put together (Windsurf, BlackBerry, PowerBook) create 1+1=3 associations. We tag these so you can spot them instantly.
This page shows 50 top-scored candidates. 0 are grade A, 128 are grade B. Availability is checked live, in your browser, against the .com zone file — nothing is logged, nothing is front-run.