History: Gismu that have the same consonants, in order

• balni bilni
• bradi bredi bridi broda brode brodi brodo brodu
• canko cinki
• cmalu cmila
• janco jinci
• merli mirli mrilu mruli
• nanmu ninmu
• plana plini
• platu pluta
• prane prina prenu

--Actually, there are many more groups like this. All 1342 gismu can be sorted into groups having the same consonant CCC core. The complete statistics is the following:

#of CCC cores #of groups

1 647 (unique gismu, not interesting)
2 193
3 66
4 16
5 4
6 3
9 1 (brd)
Total: 930 groups, 1342 words

The champion is brd: 9 gismu:

• brd: barda bradi bredi bridi broda brode brodi brodo brodu

3 groups of 6:

• plj: pelji pilji pleji pluja polje pulji
• pln: palne pilno plana plini polno pulni
• trn: tirna torni trano trene trina turni

4 groups of 5:

• brt: bartu berti birti bratu brito
• cnt: canti centi cinta cnita cuntu
• crn: carna cerni crane crino curnu
• stc: satci setca stace steci stici

16 groups of 4:

• bnd: bandu bende bindo bunda
• ckl: cakla ckilu ckule cukla
• ckn: cikna ckana ckini ckunu
• cmn: cimni cmana cmene cmoni
• cns: censa cinse cnisa cunso
• crt: cartu certu cortu critu
• ctn: catni citno ctino cutne
• grn: garna gerna grana gurni
• jbr: jabre jbari jbera jibri
• krc: karce korcu krici kruca
• mrl: merli mirli mrilu mruli
• plt: palta platu plita pluta
• pnj: panje pinji ponjo punji
• prn: prane prenu prina pruni
• snc: sance senci since sonci
• str: satre stero stura sutra

The complete list is too long to put here. I may upload the files on my website some day. --mi'e .evgenis.

Please do. --mi'e .filip.

There's also the things which might be termed "gimsu" - they are the same except with a medial consonant pair reversed. Consider sodva/sovda. That confuses me every time.

• ratcu ractu - cfipu sai mu'i lenu roreri mabru

Here's a table of gismu pairs with swapped consonants:

|bajra|barja
|balni|banli
|berti|betri
|canti|catni
|cedra|cerda
|danti|datni
|darsi|dasri
|festi|fetsi
|ganra|garna
|janta|jatna
|kabri|karbi
|kalri|karli
|kufra|kurfa
|nanvi|navni
|pulni|punli
|racli|ralci
|ractu|ratcu
|ranti|ratni
|rilti|ritli
|rinsa|risna
|sacki|sakci
|sodva|sovda
|stali|tsali
|stani|tsani
|tabno|tanbo
|tinsa|tisna

• and xrula, xlura
  • the bugger with this one is that you think 'flora' and that yields a falsefriend with xlura. --And
  • you mean xruli? --tsali
    • I doubt it, since that word's not in my gismu list, but xrula is ("flower"). mi'e filip.

Here's a table of gismu pairs with a consonant swapped with the neighboring vowel:

|bartu|bratu
|bruna|burna
|cikre|ckire
|cinta|cnita
|citno|ctino
|garna|grana
|gerku|greku
|jbini|jibni
|kruji|kurji
|marji|mraji
|pelji|pleji
|sakci|skaci
|samcu|smacu
|sarji|sraji
|stura|sutra
|tarti|trati
|tirna|trina
|tisna|tsina

(Some of us (me anyway) have been wondering about punning in Lojban,
& these last two types seem extremely promising...anybody want to
write some jokes?)

One that's come up so far is ko ko kruji "turn yourself into cream" as a pun on ko ko kurji "take care of yourself" — turning a popular(?) expression of goodwill into an insult or a threat. mi'e filip.