13-Letter Words Containing: U,S,T,R,A

• a drug used to reduce stress or tension without reducing mental clarity

• the flower of a chrysanthemum plant

• any of numerous perennial Old World herbs having showy brightly colored flower heads of the genera Chrysanthemum, Argyranthemum, Dendranthema, Tanacetum; widely cultivated

• attempting to justify or defend in speech or writing

• providing justification

• To categorize more specifically by placing in a subcategory.

• (grammar) To practice subcategorization.

• Any solid with conventional crystalline properties but exhibiting a point group symmetry inconsistent with translational periodicity

• Any qualified majority, specified in advance of a vote, required for the vote to be passed

• the act of preparing a summary (or an instance thereof); stating briefly and succinctly

• a productive insight

• making an important discovery

• a penetration of a barrier such as an enemy's defense