clear, smear, clean, freak, speak, spear, treat, bleak, break, wreak, rowan, woman, pecan, groan, solar, molar, eclat, dream, debar, polar, ideal, bread, tread, dread, swear, cleat, cheat, sweat, satan, inlaw, total, fatal, salad, cream, steam, relax, relay, belay, delay
larkspur lane latch lake lace radio, sack, hack, sandwhich, palace, pants, party, mantis, naive, paint, lasso, bass, bands, balloons
aardvark aardwolf
Some words that have the second letter U are:augustaurabullbutchercuddlecutdunedurableeuphemismEuropefullfungungutterhurlhutjudgejumpjuryjustkudoslunchluremuchmudmullmurdernudgenullnuptialouchouroutpuddingpunchpushquailquarryquartquartzquoteruderuinrulerushruthlesssuddensuitsullensuppersuretunneltummyturkeyvulnerablevulture
canalcaratfatalJapanKansaskaratkayakmacawmadamnavalpaganradarsalad
okra
khaki
autos, butte, cutie, futon, outer, tutor
Some five letter words with a second letter U are:audioauditaugerbuddybudgebuglebuildbulgebulkybullybunchbuncobunnyburntburroburstbushybutch,buttebuxombuyercubiccumincupidcuriocurlycursecurveduchyduckydummy,dumpydunceduskydustyduvetfudgefuguefumesfunkyfunnyfurryfussyfutonfuzzyguardguavaguessguestguideguildguiltguisegulaggulchgumbogummyguppygustygutsyhubbyhuffyhumanhumidhumorhumushunchhungerhunkyhurryhuskyhussyhutchjudgejuicejulepjumbojumpyjurorkudoskudzulucidluckylucrelumpylunchluridlustymucusmuddymuggymulchmunchmuralmurkymushymusicmuskymustysully,sunny,
The words with the form _L_O are also, alto, and oleo/olio.
Some four letter words with a second letter U are:auraburncurbcuredulldumbeurofundguruhugejumpjunklumpluremuchmutenudeoustpullpurepushrulerumpruinruserushrustsuchsurftune
Some three letter words with the second letter W are:awleweoweowlowntwo
No answer yet, but it probably ends with "ing"
Forty Love
Some six letter words with p as the second letter are opener, operas, sparse, and apiece.