MUTUAL, MUTUALLY
ADJECTIVES
► MUTUOUS mutual → 1683 obs.
ADVERBS
► SAM mutually; together → a1300 obs.
► SAMEN mutually; together → c975 obs.
NOUNS
► BACK-SCRATCHING the performance of mutual services; always with the suggestion of doubt as to the legitimacy of the transactions → 1897 colloq.
► TWO-WAY STREET a situation of mutual action; something that works both ways → 1951
Lexicophilia 