nation, notion, potion, reason, ration, solemn
6 letter words starting and ending with N:napkinnationneuronnotion
an on in are all 2 letter words ending in N.
Some words that end with the letter N are:apronballoonclowndrainelevenfawngreenheaveninnjavelinkitchenlemonmoonnationoceanpatternqueenraccoonscreentownunionvisionwomanxenonyearnzeppelin
Some seven letter words ending in N are:BritainbullioncautioncurtaindrunkendungeonemotionenvironerosionfashionfissiongelatinLincolnkitchenmansionmentionmillionmissionovationpassionpelicanportionpuritanvenisonversion
seven
German
patron
friction
Motion is all I can think of
falconfallenfrozenfusion
Actionacumen attain
vision