Below is a list I made of primitive combinations which are not given a name in RTK (or sometimes combinations which are named later than when they first appear). It's not completely comprehensive, but may be useful to some people. It should help you decide whether any particular combination is worth naming. (I've added a few suggestions from myself and other members.)
Also, here are a couple of other lists that may be useful:
1)
Primitive combinations that are later named as kanji in their own right.
2)
Primitives vs. Radicals. Heisig's names for the traditional 214 radicals.
The order in the list below is: number where first appears ..primitives,,numbers & other kanji where it appears. (Also, here is this data as a
spreadsheet)
148 ..old,moon,,148:湖;2470:胡;2562:瑚;2650:糊;2749:醐;
157 ..cliff,ivy,,157:涯;2227:崖;
215 ..goods,wood,,215:燥;671:操;1369:繰;2035:藻;(suggestion: “furniture”. Furniture is a common type of wooden goods)
228 ..generation,tree,,228:葉;521:蝶;2158:喋;2726:諜;2926:牒;(suggestion: “Tarzan”.Tarzan lives with several generations of his family at the top of a tree)
280 ..ten,fishhook,,280:迅;2713:訊;
323 ..crown,human legs,,323:売;348:読;1327:探;1328:深;1345:続;2297:涜;2920:亮;(Note: sometimes RTK calls this “paper punch” I prefer “Miss World”)
357 ..ten,fiesta,,357:賊;2657:絨;
400 ..ten,net(horizontal eye),,400:壊;827:聴;828:懐;885:徳;
400 ..ten,net(horizontal eye),clothing,,400:壊;828:懐;
410 ..sun,ray,,410:幌;2287:滉;2446:晃;(RTK3 names this “limpid”)
514 ..cliff,ten thousand,,514:栃;866:励;2595:砺;2697:蛎;
519 ..house,spoon,,519:蛇;2674:舵;2718:詑;2955:陀;
563 ..footprint,spoon,,563:雌;1375:紫;2043:此;2044:柴;2045:砦;2046:些;2047:髭;(RTK3 names this “this here”)
576 ..feathers,turkey,,576:曜;577:濯;1285:躍;2272:擢;2534:燿;2880:耀;(suggestion: “futon”. Your futon is made from turkey feathers.)
587 ..top hat,times,,587:壇;2138:凛;2525:檀;
613 ..craft,mediocre,,613:恐;950:築;2637:筑;
629 ..left,part of body,,629:惰;2531:楕;
674 ..ivy,wand,,674:掛;2698:罫;notRTK:卦;(suggested keyword for 卦: “divination”)
700 ..flowers,vessels,,700:護;701:獲;908:穫;
709 ..car,missile,,709:撃;2655:繋;(suggestion: “tank”. A tank is like a car with missiles)
733 ..vulture,tree,,733:採;734:菜;1714:彩;2090:采;(RTK3 names this “grab”)
743 ..by one’s side,elbow,,743:雄;2212:宏;2469:肱;2662:紘;
760 ..bring up,taskmaster,,760:撤;886:徹;notRTK:轍;
763 ..infant,flood,,763:硫;764:流;2557:琉;2922:疏;
827 ..needle,net(horizontal eye),heart,,827:聴;885:徳;
835 ..net (horizontal eye),bound up,insect,,835:濁;2539:燭;
852 ..slave,crotch,,852:賢;853:堅;1374:緊;2453:腎;2491:樫;2618:竪;2822:鰹;
876 ..nightbreak,glue,,876:得;2592:碍;
905 ..reclining,small,,905:称;2241:弥;2601:祢;(suggestion “hammock”, i.e. something small you can recline in)
923 ..cave,soil,,923:粧;2238:庄;(RTK3 names this “shire”)
927 ..bound up,rice,,927:菊;2753:麹;2787:鞠;
929 ..rice,woman,,929:数;930:楼;2221:屡;2403:薮;
932 ..umbrella,rice grains,,932:漆;2461:膝;2605:黍;2935:黎;
941 ..part of the body,power,,941:筋;2463:肋;(RTK3 names this “rib”)
946 ..bamboo,eye,,946:算;2641:纂;
958 ..person,walking stick,,958:悠;1640:候;1722:修;2130:脩;2639:篠;
1015 ..vase,crown,compass,,1015:傍;notRTK:謗;
1044 ..ceiling,mouth,hood,human legs,spike,,1044:融;1312:隔;(suggestion: “tripod” (etymological))
1085 ..door,taskmaster,,1085:啓;2893:肇;(suggestion: “bouncer”)
1120 ..monkey,crotch,,1120:捜;2577:痩;
1134 ..car,axe,,1134:暫;1135:漸;2092:斬;(RTK3 names this “chop off”)
1144 ..broom,rice grains,,1144:録;1371:緑;2145:剥;2602:禄;
1147 ..vulture,broom,heart,,1147:穏;1313:隠;
1148 ..broom,crown,crotch,,1148:侵;1149:浸;1150:寝;(suggestion: “French maid”)
1151 ..broom,apron,,1151:婦;1152:掃;1230:帰;
1167 ..mountain,comb,,1167:端;2563:瑞;
1209 ..moon,quarter,,1209:勝;1210:藤;1211:謄;1989:騰;
1244 ..ceiling,snare,,1244:誇;2526:樗;2626:袴;2744:跨;2795:顎;2824:鰐;notRTK:愕;
1244 ..St Bernard,ceiling,snare,,1244:誇;2626:袴;2744:跨;
1290 ..possess,road,,1290:髄;1298:随;
1311 ..rice,sunglasses,,1311:隣;2051:憐;2052:燐;2053:麟;2054:鱗;(RTK3 names this “shoeshiner”)
1315 ..bound up,olden times,,1315:陥;2546:焔;
1365 ..ten,crown,,1365:索;2858:勃;2883:嚢;
1366 ..public,heart,,1366:総;2677:聡;
1399 ..stamp,crotch,,1399:服;1507:報;(suggestion: “underpants”)
1408 ..chop-seal,utilize,,1408:通;1409:踊;1690:痛;2530:桶;(suggestion: “pogo stick”. A chop-seal is long and thin with a rubbery bit at the end. If it were big enough you could utilize it as a pogo stick.)
1423 ..receipt,dagger,,1423:留;1424:貿;2143:劉;2324:溜;
1463 ..net(horizontal eye),silver,glue,,1463:爵:2856:欝;
1493 ..sheaf,tree,,1493:殺;2144:刹;
1548 ..growing up,dagger,,1548:潔;1549:契;1550:喫;
1562 ..walking legs,bushes,,1562:峰;1563:縫;2375:蓬;2417:逢;2687:蜂;2768:鋒;2977:峯;
1723 ..umbrella,shape,,1723:珍;1724:診;2291:滲;2574:疹;2720:謬;(suggestion: “parasol”. It’s the same shape as an umbrella)
1804 ..two snakes,strung together,,1804:選;2253:撰;2861:巽;(RTK3 names this “southeast”)
1820 ..meeting,scrapbook,,1820:論;1821:倫;1822:輪;2656:綸;
1857 ..two drops,person,rag,,1857:衆;2939:聚;
1882 ..(backward) box of staples,(backward) box,crotch,,1882:暇;2689:蝦;2779:霞;
1885 ..reclining,floor,fishhook,,1885:気;1886:汽;
1888 ..crown,human legs(variation),,1888:沈;2472:枕;2679:耽;(suggestion: “garter”. A crown worn as a garter on one leg only)
1940 ..owl,wind,cornstalk,,1940:猟;2688:蝋;
1985 ..crotch,insect,,1985:騒;2252:掻;2681:蚤;
2150 ..person,turkey,,2150:雁;2151:贋;2237:鷹;
2240 ..three floors,two rice fields,,2240:彊;2509:橿;
2263 ..mouth,ear,,2263:揖;2392:葺;2732:輯;
2425 ..animal horns,whisky bottle,,2425:鄭;2493:楢;2906:酋;(RTK3 names this “chieftain”)
2543 ..wand,evening,crotch,,2543:燦;2798:餐;
2795 ..two mouths,ceiling,snare,,2795:顎;2824:鰐;notRTK:愕;(keyword for 愕 “startled”. 驚愕=きょうがく=astonishment)
2989 ..ceiling,flood,craft,,2989:脛;2990:勁;
Edit: added no. 700, 1148, 1399. Changed 1285 to 576.