Answer: adverbs

AnswerCrossword Clue
ADVERBSQuickly and quietly, for instance
ADVERBSSafely and soundly, for example
ADVERBSNow and then
ADVERBSParts of speech
ADVERBSAdjective modifiers
ADVERBSThemes of the puzzle (as one word, or two)
ADVERBSNow, never, etc.
ADVERBSDuly and truly, e.g.
ADVERBSHither and yon
ADVERBSModifying words
ADVERBS"How" words
ADVERBSSlowly and surely
adverbsADVERB, a word used to modify the meaning of another word
adverbsword modifying a verb, adjective, or other adverb