Thrombus Single Or Plural Words That Don't Change From Singular Home › Forums › General Discussion › Thrombus Single Or Plural Words That Don't Change From Singular Tagged: Thrombus Single Or Plural Words That Don't Change From Singular This topic has 0 replies, 1 voice, and was last updated 7 years, 7 months ago by JohnnywoolF. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In