succeed, replace, outmode

Antique has a synonym of obsolete. Obsolete has a synonym of outmoded. Since outmode is a transient verb it is always conjugated. But outmode is a word, it is 7 letters and it is a synonym for antique.

I can't come up with any exact rhymes, but here are some close ones: Morse code, dress code, zip code, encode, explode, forebode, outmode, a la mode, secret code, and church mode.

http://www.rhymezone.com/r/rhyme.cgi?Word=road&typeofrhyme=perfect&org1=syl&org2=l

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern O--M-D-. That is, seven letter words with 1st letter O and 4th letter M and 6th letter D. In alphabetical order, they are:

outmode

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 5 words with the pattern ---MOD-. That is, seven letter words with 4th letter M and 5th letter O and 6th letter D. In alphabetical order, they are:

alamode

commode

commodo

outmode

quomodo