Words

agentive

agentive

(ˈeɪdʒəntɪvPronunciation for agentive)
,

agential

(eɪˈdʒɛnʃəlPronunciation for agential)
or

agentival

(ˈeɪdʒənˌtaɪvəl)
grammar
  adjective
    1 (in some inflected languages) denoting a case of nouns, etc, indicating the agent described by the verb
    2 (of a speech element) indicating agency ■ '-er' in 'worker' is an agentive suffix

▷ 
noun
    3 
  a the agentive case
  b a word or element in the agentive case

ager

ager

(ˈeɪdʒə)
  noun
    anything that produces the effects of age on another thing

Ageratum

ageratum

(ˌædʒəˈreɪtəmPronunciation for ageratum)
  noun
    any tropical American plant of the genus Ageratum, such as A. houstonianum and A. conyzoides, which have thick clusters of purplish-blue flowers
  [C16: New Latin, via Latin from Greek agēraton that which does not age, from a-1 + gērat-, stem of gēras old age; the flowers of the plant remain vivid for a long time]