Found 3 boys and girls with the meaning of thickener
Fuller / 6 letters 
Meaning of Fuller In English, Fuller means Cloth thickener More
Fullere / 7 letters 
Meaning of Fullere In English, Fullere means Cloth thickener More
Wakler / 6 letters 
Meaning of Wakler In English, Wakler means Thickener of cloth More

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fighterfighter'sfights
figurefilibertfilled
finalfingersfinisher
firmnessfirstfirstborn
firstnamedfisherfisherman
fishingfistsfixed
flameflat-toppedfleece