Letters that make external organ
a, o, e, g, l, n, r, t, x are letters that make 'external organ'
Words within external organ
organ, ER, OR, AN, te, XT, extern, RN, external, ex, ern, tern, AL, Al, Er, Ga, Rn, Rg, Na, Te, RNA, GA are words within 'external organ'