Main Entry: 1trick·le
Pronunciation: ˈtri-kəl
Function: intransitive verb
Inflected Form(s): trick·led; trick·ling -k(ə-)liŋ
Etymology: Middle English trikelen, of imitative origin
Date: 14th century

1 a : to issue or fall in drops
b : to flow in a thin gentle stream
2 a : to move or go one by one or little by little <customers began to trickle in>
b : to dissipate slowly <his enthusiasm trickled away
http://www.merriam-webster.com/dictionary/Trickle

Main Entry: 1pro·ces·sion
Pronunciation: prə-ˈse-shən
Function: noun
Etymology: Middle English processioun, from Anglo-French processiun, from Late Latin & Latin; Late Latin procession-, processio religious procession, from Latin, act of proceeding, from procedere
Date: 12th century

1 a : a group of individuals moving along in an orderly often ceremonial way
b : succession, sequence
2 a : continuous forward movement

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Note added at 18 hrs (2009-12-26 20:23:58 GMT)
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Main Entry: 1pro·ces·sion
Pronunciation: prə-ˈse-shən
Function: noun
Etymology: Middle English processioun, from Anglo-French processiun, from Late Latin & Latin; Late Latin procession-, processio religious procession, from Latin, act of proceeding, from procedere
Date: 12th century

1 a : a group of individuals moving along in an orderly often ceremonial way
b : succession, sequence
2 a : continuous forward movement
http://www.merriam-webster.com/dictionary/procession