permutation (n.)

• alteration
• alternation
• avatar
• catabolism
• catalysis
• commutation
• consubstantiation
• cooperation
• displacement
• exchange
• give-and-take
• innovation
• interchange
• interplay
• metabolism
• metagenesis
• metamorphism
• metamorphosis
• metastasis
• metathesis
• metempsychosis
• modification
• mutant
• mutation
• mutuality
• novelty
• reciprocality
• reciprocation
• reciprocity
• reincarnation
• retaliation
• sport
• transfiguration
• transformation
• translation
• translocation
• transmigration
• transmogrification
• transmutation
• transposition
• transubstantiation
• vicissitude