Taking the list of words at https://github.com/dwyl/english-words there seem to be 271 examples, though I am not sure the original list is reliable and whether all of these would always be counted as words. For example, what does fiftyty-fifty mean and should it be fifty-fifty?
[1] "abracadabra" "aftershaft"
[3] "airy-fairy" "air-to-air"
[5] "antiagglutinant" "anticipant"
[7] "anticoagulant" "anticonvulsant"
[9] "antidepressant" "anti-depressant"
[11] "antidetonant" "antifoggant"
[13] "antiformant" "antioxidant"
[15] "antiozonant" "antiperspirant"
[17] "antipredeterminant" "antiradiant"
[19] "antistimulant" "antsy-pantsy"
[21] "archmonarch" "archpatriarch"
[23] "archphylarch" "argy-bargy"
[25] "argle-bargle" "argue-bargue"
[27] "arm-in-arm" "arsy-varsy"
[29] "astroblast" "autojuggernaut"
[31] "back-to-back" "bedaubed"
[33] "bedumbed" "beglerbeg"
[35] "benzeneazobenzene" "bid-a-bid"
[37] "biddy-bid" "bit-by-bit"
[39] "blankety-blank" "bleachable"
[41] "blow-by-blow" "calelectrical"
[43] "calendrical" "caliological"
[45] "calisthenical" "calligraphical"
[47] "calorifical" "calorimetrical"
[49] "cha-cha-cha" "chest-on-chest"
[51] "chucky-chuck" "chute-the-chute"
[53] "cinchonicin" "clickety-click"
[55] "clinkety-clink" "collar-to-collar"
[57] "cone-in-cone" "convexo-convex"
[59] "day-by-day" "day-to-day"
[61] "desuetudes" "dog-eat-dog"
[63] "door-to-door" "dos-a-dos"
[65] "east-northeast" "east-southeast"
[67] "eentsy-weentsy" "eyeball-to-eyeball"
[69] "eighty-eight" "end-to-end"
[71] "entablement" "entailment"
[73] "entalent" "entanglement"
[75] "entassment" "entertainment"
[77] "enthrallment" "enthralment"
[79] "enthronement" "enticement"
[81] "entitlement" "entoilment"
[83] "entombment" "entonement"
[85] "entrainment" "entrancement"
[87] "entrapment" "entreatment"
[89] "entrenchment" "entrustment"
[91] "entwinement" "ern-fern"
[93] "essentialness" "even-steven"
[95] "face-to-face" "fiftyty-fifty"
[97] "five-by-five" "full-to-full"
[99] "galangal" "gentleman-agent"
[101] "get-up-and-get" "gogmagog"
[103] "goody-good" "ground-to-ground"
[105] "half-and-half" "hand-in-hand"
[107] "hand-to-hand" "hawkshaw"
[109] "heart-to-heart" "heresiographer"
[111] "hose-in-hose" "hot-shot"
[113] "house-to-house" "yackety-yack"
[115] "yakety-yak" "yakity-yak"
[117] "yakkety-yak" "yellowish-green-yellow"
[119] "yellowish-red-yellow" "ingathering"
[121] "ingeminating" "ingenerating"
[123] "ingesting" "ingiving"
[125] "inglobing" "ingoting"
[127] "ingrafting" "ingraining"
[129] "ingratiating" "ingrossing"
[131] "ingrowing" "ingulfing"
[133] "ingurgitating" "insulins"
[135] "interpoint" "ionisation"
[137] "isthmist" "itsy-bitsy"
[139] "itsy-witsy" "itty-bitty"
[141] "jib-o-jib" "kingmaking"
[143] "little-by-little" "loop-the-loop"
[145] "maharmah" "mangleman"
[147] "man-to-man" "man-woman"
[149] "mastocarcinomas" "mesdames"
[151] "mesosomes" "meter-millimeter"
[153] "microchemic" "microcosmic"
[155] "microeconomic" "microphthalmic"
[157] "microseismic" "microsomic"
[159] "microthermic" "microtomic"
[161] "mouth-to-mouth" "nicotinic"
[163] "nighty-night" "ninety-nine"
[165] "okeydoke" "okey-doke"
[167] "okle-dokle" "old-gold"
[169] "one-by-one" "one-to-one"
[171] "opeidoscope" "out-and-out"
[173] "outscout" "outshout"
[175] "outspout" "overdrove"
[177] "overlove" "overprove"
[179] "overstrove" "overwove"
[181] "person-to-person" "phycography"
[183] "phyllomorphy" "phylography"
[185] "physicophilosophy" "physiography"
[187] "physiophilosophy" "physiosophy"
[189] "phytogeography" "phytography"
[191] "phytotopography" "pimperlimpimp"
[193] "play-by-play" "point-to-point"
[195] "portal-to-portal" "potent-counterpotent"
[197] "psychoepilepsy" "psycholepsy"
[199] "ramble-scramble" "rasboras"
[201] "red-collared" "red-colored"
[203] "reddish-colored" "reddish-haired"
[205] "red-eared" "redeclared"
[207] "redelivered" "red-feathered"
[209] "red-figured" "red-flowered"
[211] "red-haired" "rediscovered"
[213] "red-lettered" "red-shouldered"
[215] "red-tempered" "red-trousered"
[217] "red-upholstered" "reel-to-reel"
[219] "rescores" "respires"
[221] "restores" "restructures"
[223] "rixatrix" "salpingonasal"
[225] "self-counsel" "sermoniser"
[227] "seventy-seven" "shibuichi-doshi"
[229] "shipmanship" "shirakashi"
[231] "side-by-side" "six-by-six"
[233] "six-o-six" "sixty-six"
[235] "starosta" "station-to-station"
[237] "step-by-step" "such-and-such"
[239] "surface-to-surface" "talky-talk"
[241] "tap-tap-tap" "taratantara"
[243] "tat-tat-tat" "tessellates"
[245] "testates" "tete-a-tete"
[247] "thymopathy" "through-and-through"
[249] "tick-a-tick" "tink-a-tink"
[251] "tongue-wanton" "tormentor"
[253] "toxin-anatoxin" "toxin-antitoxin"
[255] "tum-ti-tum" "tzaritza"
[257] "underbound" "underground"
[259] "undergrounder" "under-round"
[261] "undersound" "underwound"
[263] "uricosuric" "vis-a-vis"
[265] "wall-to-wall" "west-northwest"
[267] "west-north-west" "west-southwest"
[269] "west-south-west" "wishtonwish"
[271] "word-for-word"