Dictionary (a.) Without a base; having no foundation or support.Thesaurus bottomless built on sand empty FALSE gratuitous groundless idle ill-founded indefensible needless not well-founded pointless reasonless senseless unbased uncalled-for unfounded ungrounded unjustifiable unnecessary unneeded unsolid unsupportable unsupported unsustainable unsustained untenable unwarranted vain without basis without foundation wrong |