Five-letter English word that contains only two distinct letters

Question

Is there any 5-letter English word that uses only 2 distinct letters?

Did you make this puzzle? I am pretty sure this site is for puzzles you made only. Are you even sure this exists? — user64742, Jul 17 '16 at 03:09
@TheGreatDuck - Actually externally sourced puzzles are "fine", although preferably with citation, and preferably not ones that have solutions pasted all over the net, or are just poor quality. There is a tag for unsolved-mysteries, for example. This does not seem to be everywhere or to be of poor quality (or an unsolved mystery of course), although a couple of words for close relations spring to mind pretty quickly (ease != poor quality). — Jonathan Allan, Jul 17 '16 at 04:36
@JonathanAllan true, but a user shouldnt just randomly make something up and expect an answer. From my perspective this seems like a random question. This is a new user and I believe this question is spam. — user64742, Jul 17 '16 at 05:07
@TheGreatDuck Clearly this is not spam, there is a specific question and no link. You might debate it being off-topic. Also, the user is active on a few other SE sites, so I imagine they thought this would be the correct stack to ask this question on, rather than, say, English.SE and have not just come here to post a "random" question. — Jonathan Allan, Jul 17 '16 at 05:24
@TheGreatDuck: I dunno what counts as "spam" here, but I'm definitely a human being who is very active on various SE sites. I happened to need an answer to this question, and this was the best resource I could think of for getting the question answered (as indeed it proved to be, as I promptly got answers). I seem to have caused great inconvenience and distress by posing this question. So please do accept my sincere apologies. — , Jul 18 '16 at 02:51
@KennyLJ not blatant spam. I simply felt that the question was off topic as it had no unique solution. No problem man. I guess not all questions have to be puzzles on here. :) — user64742, Jul 18 '16 at 05:11

f'' · Accepted Answer · 2016-07-17T03:20:31.837

8

This regex dictionary returns 34 matches. I removed the ones that were proper nouns or that I couldn't find definitions of:

ajaja: species name of the roseate spoonbill?
alala: ʻalalā, a Hawaiian crow.
anana: alternate name for a pineapple?
arara: a palm cockatoo.
cocco: a taro tuber.
esses: plural of "ess", the letter S.
hoooo: transliteration of Japanese 鳳凰 (phoenix).
mamma: alternative spelling of "mama", or a mammary gland.
nanna: a word for a grandmother.
pappa: a word for a father.
susus: plural of "susu", a money sharing group.
taata: a word for a father.
tatta: a bamboo frame.
uhhuh: (usually hyphenated) an affirmative response.
ululu: a wail.
unnun: to cause someone to stop being a nun.
xxiii: Roman numerals for 23 (32, 39, 41, etc. weren't listed but would also work the same).

edited Jul 17 '16 at 03:20

answered Jul 17 '16 at 02:35

f''

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What's the regex for that? – Carl Jul 17 '16 at 02:48
Thanks. I think MAMMA is the one word that comes closest to qualifying as an "English word". – Jul 17 '16 at 03:02
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@Carl ^([a-z])\1*([a-z])(\1|\2)*$ with the length restricted to 5 produces that list. – f'' Jul 17 '16 at 03:04
1

Anti-Wordle players from the future are grateful for this answer. – smcg Mar 20 '22 at 21:16

DooplissForce · Answer 2 · 2016-07-17T02:39:56.390

2

Some I can think of are:

ESSES, the plural of ess (the letter S)
MAMMA, "a mammary gland and its accessory parts"

edited Jul 17 '16 at 02:39

answered Jul 17 '16 at 02:33

DooplissForce

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Five-letter English word that contains only two distinct letters

2 Answers2