Affirmation, Ambition, Angle, Antecedents, Aspiration, Assertion, Assumption, Axiom, Base, Basement, Bed, Bedding, Bedrock, Bottom, Burden, Call, Situation, Slant, Source, Spring, Stand, Standpoint, Start, Statement, Stimulus, Subject, Substance, Substratum, Substructure, System, Text, Theme, Theorem, Thesis, Topic, Undercarriage, Underpinning, Universe, View, Viewpoint, Vocation, Warrant, Calling, Case, Causation, Cause, Chapter, Concern, Consideration, Data, Determinant, Determinative, Element, Essence, Eye, Factor, Floor, Flooring, Fond, Footing, Foundation, Framework, Fundamental, Gist, Goal, Ground, Grounds, Groundwork, Head, Heading, Heart, Hypothesis, Ideal, Infrastructure, Inspiration, Intention, Issue, Justification, Law, Lemma, Light, Lodestar, Mainspring, Matter, Meat, Motif, Motive, Occasion, Outlook, Pavement, Place, Point, Position, Postulate, Postulation, Premise, Presumption, Presupposition, Principle, Problem, Proposition, Question, Radical, Reason, Regard, Respect, Rest, Right, Root, Rubric, Sake, Score, Seat, Side, Sight