Mister Micawber.
Seven letters and common...
Tissues? >> No, but you can keep two vowels and a consonant.
Traffic? >> No, but in my word there's a double consonant in the same place as in "
traffic" (not an "f," though).
Toenail? >> Mm ... somewhat (indirectly) related to my noun.
Trouble? >> No, but you can keep a vowel and two consonants.