Cluster is a 7 letter word that means gather together. Other words include collect, combine and compile.
Collect.
The second letter of the seven letter word meaning "one-fourth" is "u." The word is "quarter."u as in quarter
A seven-letter word meaning 'including everything' is 'overall'.
A seven-letter synonym for 'egg shaped' is obovoid or obovate.
Examples of seven letter synonyms for the verb to reveal are:confessdeclaredivulgeexplainpublishpresentprofessuncover
surreal
missing
counsel
desired
uncover
poached
getaway