congru- +

(Latin: to agree, to come together, to correspond with; "suitable, proper," from Latin congruentem, congruens, "agreeing, fit, suitable" from congruere, literally, "to come together, to agree, to meet", from com-, "with, together" + gruere, ruere, "to fall, to rush")

congruence
In agreement with, having harmony with, or compatibility with someone or something.
congruency
In harmony with or in accord with what should be expected as being proper, reasonable, appropriate, or consistent: "The results of the report show very good congruence with recent research into the subject."
congruent
1. Coinciding or agreeing when superimposed; for example, congruent shapes are exactly the same size and shape.
2. In a condition, situation, of agreement : "His statement is not congruent with the facts about his questionable investment."
3. A reference to geometric figures which have exactly the same size and shape; such as, when two triangles are congruent if their sides are the same length and their internal angles are of the same size.
congruently
In a congruent manner or in accordance, agreement, and harmoniously.
congruism
1. The state or fact of agreeing with or being consistent with each other or with something else.
2. The quality or fact of being suitable or appropriate for something.
congruist
Someone who is in agreement with others or who has harmonious relationships with other people.
congruity
1. A point of agreement or an appropriate harmony.
2. In geometry, the exact coincidence or a situation in which separate things happen by chance at the same time or in the same way; such as, lines, angles, figures, etc.
congruous
1. Appropriate to or suitable for a particular thing or situation.
2. In agreement with or in harmony with: "Her explanation is congruous with earlier presentations."
congruously
A reference to being consistent with other people or being suitable for something else.
congruousness
Something that is agreed upon or a point at which there is agreement.
incongruence
Not in harmony or keeping with the surroundings or other aspects of a situation: "The brightly colored coat appeared to be an incongruence with the black suit he was wearing underneath."
incongruent
Not corresponding in structure or content or not in agreement with other people.
incongruently
A reference to not being in agreement with or not in harmony in structure or content.
incongruity (s), incongruities (pl)
Something which is out of place or that does not seem to fit in with or which is not appropriate to its context.
incongruous
That which is unsuitable, odd, strange, or out of place in a particular setting or context.