There are some tells as to whether a noun is masculine or feminine in French. A lot of has to do with the endings of the nouns. For example the endings for masculine nouns are generally: -age -ment -il, -ail, -eil, -ueil -é (but not -té) -eau and -ou -ème, -ège -i, -at, -et and -ot -er -oir -isme -ing -ard Feminine: -tion, -sion and -son -ure -ude, -ade -ée -té -ière Consonant followed by -ie -euse -ance, -ence Most other endings consisting of Vowel + Consonant + e: -ine, -ise, -alle, -elle, -esse, -ette. Like most grammar rules, there are exceptions and those have to be memorized.

When a word ends with euse, eé, se, ère, ve, gue (E of guE with diaeresis but i don't know how to write it ahah), teuse, trice and, in general (but there are exceptions) with 'e' is feminine. :)